Browse 994 videos in category Documentary
Helium is the second most abundant element in the universe. Here on Earth, supplies are shrinking and prices skyrocketing. But the problem runs far deeper than that, as CBC's Aaron Saltzman explains.
- 550 views
- 4 comments
The Mediterranean supports countries in Europe, the Middle East and North Africa—but its fish stocks are almost completely collapsed. Meet the man who is leading attempts to revive its marine habitats.
- 506 views
- 2 comments
Why are itchy lice so tough to get rid of and how do they spread like wildfire? They have huge claws that hook on hair perfectly, as they crawl quickly from head to head.
- 891 views
- 7 comments