Name: Why leaves change color: the science of fall foliage
Uploaded: Mon Oct 21 2019 16:30:21 GMT+0000 (UTC)
Duration: 1 min 53 s
Description: It’s the most iconic sign of autumn: leaves change from green to a brilliant array of reds, purples, oranges, and yellows that all too quickly fall to the ground. But what causes this process to happen? Mach explains.

Oct. 21, 201901:53