08:39
The Water Planet: Origin of Life on Earth
There is no definitive evidence that proves beyond a doubt where water originated. But wherever it came from, water did eventually cover more than two-thirds of Earth's surface. The implications of this for the formation of life on planet Earth were...
04:00
Living Together: Hydrothermal Vents: Life in the Extreme
Hydrothermal vents were discovered by the submersible Alvin in 1977. They are sometimes characterized as deep ocean hot springs found thousands of feet beneath the surface. Hydrothermal vents are of great interest because of their circulation proces...