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Earthrise 2015 LRO

Water Theories Evaporate

After decades of telling the public comets brought Earth's water, scientists are giving up on the idea. It was volcanoes, now they say.

Secular Ocean Theory Evaporates

The divination experts see a new vision emerging from meteorites, portending disaster.

New Earth Ocean Theory Is All Wet

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

Fish News and Fish Stories: Water You Know?

Some marine biology news is amazing; some just plain dumb.

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?