Kids love trees. How do we know? They send us a LOT of questions about our bark-wrapped friends.

How do trees make oxygen? How do they grow? How do evergreens stay green all year? Why do tree leaves change color? How long can trees live? We’re branching out to tackle all these questions + we drop in on the world’s oldest tree.

Methuselah Tree
Methuselah Tree, Bristlecone pine, White Mountain, California, June 29, 2013.
Chao Yen
Music in this episode by Adam Selzer.