Why do bats hang upside down? That's what fifth graders living in the Bat Capital of the World - Austin, Texas - want to know. We visit Micaela Jemison at the world headquarters of Bat Conservation International to figure out why bats have such weird sleep habits. Plus, why would bats walk on treadmills? They're mysterious creatures. This is the first in a series of shows featuring kids' questions. We want to hear what you think! Email us at tumblepodcast@gmail.com, message us on Facebook, and tweet us on Twitter. Send us your bat t-shirt designs and we'll share them!