What is a Weir?

15:16
How Different Spillway Gates Work

8:40
The Most Dangerous Dams

16:29
Todas as barragens são temporárias

17:48
Why Rivers Move

14:11
Inside Africa's Food Forest Mega-Project

18:27
Forget Doping, These GENIUS Cheaters Will Blow Your Mind

18:15
A Ciência da Planicidade

24:33