A blue whale, the largest animal on the planet, engulfs krill off the coast of California. Silverback Films/BBC/Proceedings of the Royal Society B hide caption

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Silverback Films/BBC/Proceedings of the Royal Society B

The Two-Way

How The Biggest Animal On Earth Got So Big

Whales might be the largest animals on the planet, but they haven't always been so huge. Researchers say the ocean giants only became enormous fairly recently, and over a short period of time.

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A blue whale, the largest animal on the planet, engulfs krill off the coast of California. Silverback Films/BBC/Proceedings of the Royal Society B hide caption

toggle caption
Silverback Films/BBC/Proceedings of the Royal Society B

How The Biggest Animal On Earth Got So Big

  • Download
  • <iframe src="https://www.npr.org/player/embed/529505847/529804700" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
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