WATCH LIVE:

Extreme Green: Earth Recycles 2.5-Billion-Year-Old Ocean Crust

LiveScience.com
Extreme Green: Earth Recycles 2.5-Billion-Year-Old Ocean Crust
An cross-polarized light image of the lava sample from Mangaia island, showing sulfide grains in the rock at 1.5 times magnification.
View Comments (0)