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Did Earth Get Its Water from Meteor Squirt Guns?

You can't just fire bullets at pumice and claim that Earth got its oceans that way.

Solar System Theories Challenged

"Everything we know about the formation of solar systems might be wrong," say two astronomers who discovered something "very bizarre."

New Earth Ocean Theory Is All Wet

Time to rewrite the textbooks again. Earth started out wet, scientists now claim, overturning decades of dogma.

Origin of Life for Dummies

Readers can decide if these news stories on the origin of life represent smart science or not.

First Rosetta Science Results Are Surprising

The first suite of science papers from the Rosetta mission has been published, giving new insights about comets.

Comet Ocean Theory Debunked

Data from the Rosetta mission debunk the notion that comets brought Earth's ocean water. Now they're hoping asteroids could have.

Asteroids as Water Balloons Gave Us Oceans

Planetary scientists are looking to asteroids as the source of Earth's water – not from evidence, but from desperation.

Comety Show: Oceans from Space

Finally, a comet has been found with a deuterium-to-hydrogen ratio that is close to that found in Earth’s oceans. That had not been true of many other comets. Astrobiologists claim this ration in Comet Hartley 2 as “proof” that our water came special delivery from water-balloon comets. But why do they believe that, what constitutes proof, and what new problems does the “proof” lead to?
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