mercredi 10 mai 2017

4.4 billion years ago Earth had no mountains and was covered with water, say scientists

Tiny grains of zircon have allowed two scientists at Australian National University to paint a portrait of Earth over four billion years ago. Their scrutiny of the mineral grains - the oldest fragments of Earth we've ever uncovered - led them to think our world was a much different place back then. They say Earth was mountainless and barren, and probably only had a few islands poking up above the water blanketing the rest of the planet.

from Inhabitat - Green Design, Innovation, Architecture, Green BuildingInhabitat – Green Design, Innovation, Architecture, Green Building http://ift.tt/2pjCUtL
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