Survivors • 2018 • episode "3/3" • Age of Big Cats

54:34

This episode is devoted to the evolution of reptiles. They are not as restricted as their amphibian ancestors, since they can survive in the hottest climates. The reason is their scaly, practically watertight skin. The scales protect the body from wear and tear and in the case of some species of lizard, such as the Australian thorny devil, serve to protect from attack. The horned iguana from the West Indies is also one of the most heavily armoured. The skin is rich in pigment cells, which provide effective means of camouflage, and the chameleon is a well-known example. Temperature control is important to reptiles: they cant generate body heat internally or sweat to keep cool.

7/13 • Life on Earth • 1979 • Nature

59:02

The first three critical months are when our animal babies have to rapidly get to grips with their new family and the challenges of environment that surrounds them.

1/3 • Animal Babies: First Year on Earth • 2019 • Nature

58:30

Africa's largest herd of elephants and a fearless pride of young lions come face to face in an epic fight for survival. Rarely do their worlds collide, until now. This is no chance conflict; nature has played its part. Drought has weakened the elephants, and the lions are desperately hungry. The dawn of the giant killers has arrived.

Natural World • 2014 • Nature

28:58

In a revelatory look at Svalbard, the most northerly region in the series, Steve Backshall leaves no stone unturned as he unravels the secrets that lie covered in ice for most of each year. Svalbard is cold, dark and foreboding, yet it is home to the world's largest land predator and the most northerly population of large herbivore, but Steve discovers that the real secret to this place comes from a very different world.

Part 6 • Nature's Microworlds • 2012 • Nature

4:17

Traveling is extremely arduous for microscopic sperm -- think of a human trying to swim in a pool made of...other humans.

TED-Ed • Nature

48:01

The wild dogs of Luangwa Valley are organized, tenacious and strictly hierarchical under the leadership of an alpha pair. While cheetahs sprint and lions ambush, wild dogs rely on their stamina to wear prey out, sometimes running up to 20 miles at a time. But to maintain dominance, they'll need to train their youngest members to hunt effectively as part of the pack-and time is running out.

S2E5 • Africa's Hunters • 2018 • Nature