Water
You know the old rule that you need to drink eight glasses of water every day Its simply a myth says Dr. Jen Gunter. In this episode she ...View full lesson
David Gallo shows jawdropping footage of amazing sea creatures including a colorshifting cuttlefish a perfectly camouf...View full lesson
Water is both essential and unique. Many of its particular qualities stem from the fact that it consists of two hydrog...View full lesson
Fresh water accounts for only 2.5 of Earths water yet it is vital for human civilization. What are our sources of fres...View full lesson
Fresh water is essential for life and theres not nearly enough of it for the world right now. Why is that and what co...The world needs clean water and more and more were pulling it from the oceans desalinating it and drinking it. But what to do with the sa...After a crisis how can we tell if water is safe to drink Current tests are slow and complex and the delay can be deadly as in the cholera...