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We know whales as graceful giants bound to the sea. But what if we told you there was actually a time when whales could walk.

Thanks to Lucas Lima and Studio 252mya for their illustrations. You can find more of Lucas' work here: https://252mya.com/gallery/lucas-lima

Produced for PBS Digital Studios.

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References:
http://web.neomed.edu/web/anatomy/The...
https://www.researchgate.net/publicat...
https://link.springer.com/article/10....
http://www.amnh.org/explore/news-blog...
http://www.prehistoric-wildlife.com/s...
http://evolution.berkeley.edu/evolibr...
http://stories.anmm.gov.au/whale-evol...
http://www.smithsonianmag.com/smithso...
http://repository.ias.ac.in/4642/1/31...
https://link.springer.com/chapter/10....
https://www.britannica.com/science/Eo...
http://ngm.nationalgeographic.com/201...
http://www.pbs.org/wnet/nature/ocean-...
https://www.theatlantic.com/science/a...
   • Nature: Whale Evolution and Indohyus  
http://www.pnas.org/content/96/18/102...
https://www.sciencedaily.com/releases...
https://www.nature.com/news/2007/0712...
https://books.google.com/books?id=udC...
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https://phys.org/news/2005-01-scienti...
http://www.pnas.org/content/96/18/102...
https://link.springer.com/article/10....

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