News tagged with early earth

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Solar system ice: Source of Earth's water

Scientists have long believed that comets and, or a type of very primitive meteorite called carbonaceous chondrites were the sources of early Earth's volatile elements—which include hydrogen, nitrogen, ...

Jul 12, 2012
4 / 5 (7) 32 | with audio podcast

'Baby fat' on the young sun?

To deal with the faint young Sun paradox, researchers are taking a fresh look at an old idea: that the Sun started out larger and more luminous than we thought.

Feb 14, 2012
4.2 / 5 (5) 13 | with audio podcast