Day 5 Extras: How do Bats and Pterosaurs Move? Plus Manatees and Bird Families

Published: Dec. 14, 2015, 6:29 p.m.

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Episode 23: What do bats and pterosaurs have in common? How they get around gives scientists plenty to puzzle over. But first, a list of all the major bird families (and websites to find out more), and then it's underwater to visit the gentle giants, Manatees!

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