|Image credit: morgueFile / kconnors|
Time to rewrite the textbooks again. Earth started out wet, scientists now claim, overturning decades of dogma.To read the rest, click on "New Earth Ocean Theory Is All Wet". No, you won't need to put on your wellies.
“Earth may have kept its own water rather than getting it from asteroids,” reads a story title in Science Magazine , a summary of a paper in Science. The authors concluded, from divination of lavas on Baffin Island collected in 1985 (Astrobiology Magazine), that the mantle must have gained its water directly from the protoplanetary nebula.
Astronomers had been telling the public for many years that Earth started out dry and got its water from comets. When the deuterium ratio of comet ice turned out to be too high, they had a problem.