BBC Earth (BBCE)

Tackling one of the biggest questions in science: whether there is, or ever was, life on Mars.

Hannah Fry discovers the hidden WW2 radar technology that heats up baked beans, learns the legend of the melted candy bar in an engineer's pocket that kick-started a kitchen revolution, and puts her life on the line to demonstrate why microwaves zap food but not people!

Gregg Wallace visits a factory making 432 million crumpets every year. Cherry Healey learns the science of making batter for pancakes, and Ruth Goodman reveals how crumpets got their bubbles.

A look at autumn when polar landscapes are transformed as the big freeze returns. Most animals leave on epic journeys, while polar bears gather on the coast to wait for the return of the ice.

Steve encounters one of the most feared predators in Africa, the spotted hyena.

Steve and the team look for the Sri Lankan leopard at the Yala National Park.

Sun bear cubs Denny Bear and India arrive at a sister sanctuary, where inseparable friends Kopral and Shelton have an extraordinary bond. Back at the main compound, a quiet afternoon in the clinic turns hectic when two orangutans fall dangerously ill.

Deer season brings an influx of fawns into the rehab; Chelsea tries to reunite a fawn with its mom; two police officers rescue another after its mother was hit by a car.

A survey of Cape Breton Island goes from Canso Causeway to the Cape Breton Highlands.

Documenting NASA's Phoenix mission to search for water on Mars and determine whether the planet may have sustained life in the past.

Deer season brings an influx of fawns into the rehab; Chelsea tries to reunite a fawn with its mom; two police officers rescue another after its mother was hit by a car.

A survey of Cape Breton Island goes from Canso Causeway to the Cape Breton Highlands.

Documenting NASA's Phoenix mission to search for water on Mars and determine whether the planet may have sustained life in the past.

Wine makes friends with a young macaque; A mother and son from a Thai circus live a new life on a pre-release island.

Gregg visits a factory that churns out up to 90,000 vegan sausages a day, while Ruth Goodman uncovers the green shoots of the vegetarian movement in Britain.

Brian examines scientific work that has generated controversy, including genetic modification and the production of nuclear weapons.

Zac and Darin test their cooking skills in Melbourne before heading to the Torres Strait Islands to understand the impact of rising sea levels.

Tackling one of the biggest questions in science: whether there is, or ever was, life on Mars.

Hannah Fry discovers the hidden WW2 radar technology that heats up baked beans, learns the legend of the melted candy bar in an engineer's pocket that kick-started a kitchen revolution, and puts her life on the line to demonstrate why microwaves zap food but not people!

Gregg visits a factory that churns out up to 90,000 vegan sausages a day, while Ruth Goodman uncovers the green shoots of the vegetarian movement in Britain.

Animals adapt to bitter cold and strong winds as temperatures plummet to 70 degrees below zero.