Uncategorized
- Physics
The Black Hole Next Door
Microscopic black holes—fleeting replicas of the huge, matter-gobbling ones in space—may be detected soon in our atmosphere and at a big particle collider now being built.
-
19065
I was surprised to see no mention of small comets hitting Earth’s atmosphere over the eons as a source of surface water. This explanation, based on atmospheric observations, has gained growing acceptance over the past several years. Kenneth Saum Cotuit, Mass. Jonathan I. Lunine says that if local bodies provided water to Earth, then “Mars […]
- Earth
Water for the Rock
A long-popular theory about how Earth got wet—that the oceans are puddles left by an ancient rain of comets—doesn't seem to hold water, and new hypotheses suggest that the celestial pantry is now empty of a key ingredient in the recipe for Earth.
