Extreme Shrimp May Hold Clues to Alien Life At one of the world's deepest undersea hydrothermal vents, tiny shrimp are piled on top of each other, layer upon layer, crawling on rock chimneys that spew hot water. Asteroid impacts on Earth make structurally bizarre diamonds PhysOrg - 10 hours (Phys.org) —Scientists have argued for half a century about the existence of a form of diamond called