Get Started for FREE
Sign up with Facebook Sign up with X
I don't have a Facebook or a X account
 Your new post is loading...
Your new post is loading...
Scoop.it!
See National Geographic photo editors' favorite news pictures of the month—a winter swimmer, burned Egyptian treasures, and more. 
No comment yet.
Sign up to comment
|
Scoop.it!
Trees almost always grow so that the total thickness of their branches at a particular height is equal to the thickness of their trunks. Until now, no one has been able to explain why trees obey this rule, which Leonardo da Vinci first noticed.
|
