Air and Space

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

A one-way trip to Mars would save billions and eliminate the risks of a return voyage.

John Langford discusses the future of air mobility.

A look at a new pair of missions to get closer to Jupiter's icy moons; exploring whether the conditions for life exist beyond Earth.

In the closing days of World War II, a daring band of American pilots embarks on a secret mission to capture a revolutionary German aircraft that will change the course of history.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

It was the thick of WWII and Allies needed a way to get behind enemy lines. It would take an advanced flying machine to get this job done, pushing the limits of rotary flight.

The OSIRIS-REx team launches a spacecraft to an asteroid to collect a sample of Bennu.

Host Sean Riley charts a course into the wild blue yonder to look back at the original challenges of air travel and forecast what's next in aviation.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

A new breed of aviators is innovating new ways to fly from clean and green electric aircraft to autonomous sky taxis.

During World War I, several new innovations emerged on the battlefield and proved crucial to breaking the stalemate of trench warfare. High on the list was the tank and the airplane.

When it comes to space exploration, expect the unexpected. As OSIRIS-REx approached asteroid Bennu, scientists were surprised to find a loosely packed rubble pile. This week, we get a closer look at Bennu and the surprises it holds in store.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Made mainly of wood, the German Me 162 Last Stand jet fighter was assembled with slave labor; it worked, but came too late to help them stop the Allied advance.

While humans debate which is worse, dwindling resources or planet-killing celestial bodies, new breakthroughs in extra-planetary surveying and rocket propulsion are revealing the dichotomy of asteroids.

Drones head into outer space with the Mars Helicopter's success paving the way for Dragonfly, a daring future mission to Titan.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

On the 50th anniversary of Apollo 13, Cmdr. Jim Lovell and NASA engineers recall the ingenuity and superhuman efforts that turned a potential space flight disaster into an extraordinary fight for survival.

For the first time, scientists have captured a photograph of a black hole which verifies one of the most important theories in physics and might help unlock the greatest mysteries of the cosmos.

Undeterred by setback, the Miles brothers press on after the warand try to overcome economic hurdles to keep their company and the Aerovan alive.

The birth of the solar system was violent and chaotic as planets formed, and gravity and luck determined their fates.

Having developed a jet engine, the Nazis endeavored to use it where it was needed most, to stop the D-Day invasion; for this task they dreamed up two wild-looking jet aircraft that flew with the engine mounted on their backs.

Since fighter planes lack enough fuel to trek deep into enemy territory, engineers find ways for fighters to bring along their supplies.

The Junkers JU-52 Iron Auntie was Germany's workhorse transport for years. But German engineers also created ambitious competitors like the Botha 244, the Massive Messerschmitt 323 Gigant and the BV 222 Viking.

The OSIRIS-REx team enters the final stretch of its quest to sample asteroid Bennu.