BBC Earth

All life is driven by the need to breed. Yet for a few, the odds of success are overwhelmingly against them, so these have adopted the most extraordinary mating strategies of all.

66 million years ago, an orphaned baby Triceratops roamed the lush world of Laramidia, alone and vulnerable. Stalked by the fearsome Tyrannosaurus Rex, the youngster relied on her wits to survive.

Paddy McGuinness is at the Warburtons factory where he worked as a teenager.

Asia is the most mountainous continent on earth. From the tropical south to its barren centre, its highest places are home to some of our planet's most remarkable wildlife.

Mysterious disappearances, brutal attacks, wounded people leaving trails of blood. Can a ruthless predator fish with razor-sharp teeth like the piranha, really be responsible?

66 million years ago, an orphaned baby Triceratops roamed the lush world of Laramidia, alone and vulnerable. Stalked by the fearsome Tyrannosaurus Rex, the youngster relied on her wits to survive.

Ash Dykes ends his journey at Jiayuguan, visits Crescent Moon Lake, meets Mr. Dong at Yardang, and concludes at Yumenguan Fortress, marking the Great Han Wall's end.

Cyril's attention is captured by videos of two huge, unidentified creatures appearing off of Florida's coast - and discovering what these monsters are becomes an obsession. Is it even a fish?

Steve Backshall is on a mission to create a new generation of shark saviours, but first he needs to find his team. Steve takes 12 young UK hopefuls to boot camp.

Steve Backshall has chosen his UK team of six to travel with him to Bimini in the Bahamas, where they learn how to scuba dive and become the next generation of shark saviours.

Robson and brother David head to a farm near Hexham for a lesson in jam making. They try making a terrarium - a miniature garden in glass - and head to their childhood favourite beach, Druridge Bay.

England football hero Steph Houghton joins Robson in Teesdale. He takes the former Lioness tree climbing and canoeing, and they learn how to light a fire with sticks.

Volcan del Fuego in Guatemala is one of the most 'explosive' volcanoes of them all. To reveal what's happening within the volcano, witness the daring attempt to lower a data gathering probe inside.

Cyril's attention is captured by videos of two huge, unidentified creatures appearing off of Florida's coast - and discovering what these monsters are becomes an obsession. Is it even a fish?

Steve Backshall has chosen his UK team of six to travel with him to Bimini in the Bahamas, where they learn how to scuba dive and become the next generation of shark saviours.

Robson and brother David head to a farm near Hexham for a lesson in jam making. They try making a terrarium - a miniature garden in glass - and head to their childhood favourite beach, Druridge Bay.

England football hero Steph Houghton joins Robson in Teesdale. He takes the former Lioness tree climbing and canoeing, and they learn how to light a fire with sticks.

Volcan del Fuego in Guatemala is one of the most 'explosive' volcanoes of them all. To reveal what's happening within the volcano, witness the daring attempt to lower a data gathering probe inside.

Ash Dykes ends his journey at Jiayuguan, visits Crescent Moon Lake, meets Mr. Dong at Yardang, and concludes at Yumenguan Fortress, marking the Great Han Wall's end.

66 million years ago, an orphaned baby Triceratops roamed the lush world of Laramidia, alone and vulnerable. Stalked by the fearsome Tyrannosaurus Rex, the youngster relied on her wits to survive.

Steve Backshall is on a mission to create a new generation of shark saviours, but first he needs to find his team. Steve takes 12 young UK hopefuls to boot camp.

Steve Backshall has chosen his UK team of six to travel with him to Bimini in the Bahamas, where they learn how to scuba dive and become the next generation of shark saviours.

Robson and brother David head to a farm near Hexham for a lesson in jam making. They try making a terrarium - a miniature garden in glass - and head to their childhood favourite beach, Druridge Bay.

England football hero Steph Houghton joins Robson in Teesdale. He takes the former Lioness tree climbing and canoeing, and they learn how to light a fire with sticks.

Ash Dykes ends his journey at Jiayuguan, visits Crescent Moon Lake, meets Mr. Dong at Yardang, and concludes at Yumenguan Fortress, marking the Great Han Wall's end.