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> Origins of earth's water

Origins of earth's water

author: Ron Miller/Novapix

reference: t-glb91-01015

Image Size 300 DPI: 22 * 29 cm

Asteroids impacts on Earth, four billion years ago. Earth’s water was thought to have been delivered by volatile-rich comets and asteroids, originally formed in the outer solar system, impacting Earth.

Keywords for this photo:

ASTEROID - COMET - EARTH - HISTORY OF EARTH - ILLUSTRATION - IMPACT - PLANET - PRECAMBRIAN - PRIMITIVE EARTH - TEMPERATURE - WATER -