Why are Blue Whales so Enormous?

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What evolutionary advantage do blue whales gain by being so big? Their tiny food source, krill, holds the key to the answer. This TED-Ed video by Asha de Vos seeks to explain with the entertaining help of puppets and animation.

Watch the video and learn something new today!

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The Rainforest Site is a place where people can come together to protect our environment for generations to come. In addition to signing important environmental petitions, shopping for the cause, and learning about the natural world, visitors can take just a moment each day to click on a green button to preserve vital wildlife habitat. Visit The Rainforest Site and click today - it's free!