Extras

Video thumbnail: When Whales Walked: Journeys in Deep Time Crocodile Ancestors

When Whales Walked: Journeys in Deep Time

Crocodile Ancestors

Scientists are now discovering the earliest ancient crocodiles.

Crocodile Ancestors

Video thumbnail: When Whales Walked: Journeys in Deep Time Birds Are Living Dinosaurs

When Whales Walked: Journeys in Deep Time

Birds Are Living Dinosaurs

Birds have colonized every environment on Earth, so how did they come to be so diverse?

Birds Are Living Dinosaurs

Video thumbnail: When Whales Walked: Journeys in Deep Time Empire of Elephants

When Whales Walked: Journeys in Deep Time

Empire of Elephants

Today there are three species of elephant, but 16 million years ago there were dozens.

Empire of Elephants

Video thumbnail: When Whales Walked: Journeys in Deep Time Walking Whale Ancestor

When Whales Walked: Journeys in Deep Time

Walking Whale Ancestor

Blue whales are the biggest creatures ever. But how did they get so big?

Walking Whale Ancestor

Video thumbnail: When Whales Walked: Journeys in Deep Time When Whales Walked: Journeys in Deep Time | Teaser

When Whales Walked: Journeys in Deep Time

When Whales Walked: Journeys in Deep Time | Teaser

Discover the evolutionary secrets of some of the world’s most majestic creatures.

When Whales Walked: Journeys in Deep Time | Teaser

Video thumbnail: When Whales Walked: Journeys in Deep Time When Whales Walked: Journeys in Deep Time | Trailer

When Whales Walked: Journeys in Deep Time

When Whales Walked: Journeys in Deep Time | Trailer

Discover the evolutionary secrets of some of the world’s most majestic creatures.

When Whales Walked: Journeys in Deep Time | Trailer

Video thumbnail: When Whales Walked: Journeys in Deep Time When Whales Walked: Journeys in Deep Time | Preview

When Whales Walked: Journeys in Deep Time

When Whales Walked: Journeys in Deep Time | Preview

Discover the evolutionary secrets of some of the world’s most majestic creatures.

When Whales Walked: Journeys in Deep Time | Preview