When Whales Could Walk
A spectacular fossil graveyard reveals a 43-million-year-old whale that had four legs and could walk. Follow scientists as they search for new clues to how mammals moved from land into the sea to become the largest animals on Earth.
Previews + Extras
When Whales Could Walk Preview
S51 E1 - 30s
A spectacular fossil graveyard reveals a 43-million-year-old whale that had four legs and could walk. Follow scientists as they search for new clues to how mammals moved from land into the sea to become the largest animals on Earth.
The whale that could walk
S51 E1 - 2m 48s
A small furry carnivore that lived both on land and sea is the ancestor of modern whales.
Ancient whale fossils found in the desert
S51 E1 - 2m 10s
This part of the Sahara Desert is the resting place of some of the earliest whales ever found. These fossils may hold the key to how whales evolved.
Similar Shows
![Untold Earth: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2024/04/17/263396-X24Z6SY-show-poster2x3-8ESH25R.png?itok=YsV3c3Fx)
Untold Earth
Science and Nature
![Big Pacific: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2024/04/17/4578-3xu7STp-show-poster2x3-m8QDcso.png?itok=218PBrM3)
Big Pacific
Science and Nature
![The Brain Revolution: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2023/05/11/15040-pco7xXl-show-poster2x3-gB223or.jpg?itok=0Atj740b)
The Brain Revolution
Science and Nature
![First Contact: An Alien Encounter: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2022/11/08/242390-vqsW3e5-show-poster2x3-sZ7cXKU.jpg?itok=qjtGPLg2)
First Contact: An Alien Encounter
Science and Nature
![Songs for Unusual Creatures: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2021/07/29/3215-UL92GcFbfELl0bmMzJKZA.jpg?itok=BODYyV7U)
Songs for Unusual Creatures
Science and Nature
![Greta Thunberg: A Year to Change the World: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2024/04/17/159056-OD4VXPN-show-poster2x3-du25Y11.jpg?itok=1LeaY47Q)
Greta Thunberg: A Year to Change the World
Science and Nature
![Rivers of Life: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2024/04/17/2300-JfPHqtv-show-poster2x3-umesHcK.jpg?itok=n-MGENbq)
Rivers of Life
Science and Nature
![The Great Whale Rescue: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2022/07/20/228504-L9kc1Q2-show-poster2x3-LhEvc3b.jpg?itok=7MbrOt6N)
The Great Whale Rescue
Science and Nature
![Human Footprint: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2024/04/17/267453-J64VCnV-show-poster2x3-FGrugb4.jpg?itok=TFzuGKFs)
Human Footprint
Science and Nature
![Genius by Stephen Hawking: show-poster2x3](/sites/default/files/styles/230x346/public/pbs_media_manager_images/2024/04/17/3892-SgdNjmpeMfXEbqF0JPFlEQ.jpg?itok=iHXVugJc)
Genius by Stephen Hawking
Science and Nature
WETA Passport
Stream tens of thousands of hours of your PBS and local favorites with WETA Passport whenever and wherever you want. Catch up on a single episode or binge-watch full seasons before they air on TV.