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When Did Life on Earth Begin? Ask a Rock
Some of the oldest rocks on Earth, found in Greenland, hold important clues to life's beginnings. The problem is, experts disagree both about how to interpret the clues and about how old the rocks really are.
Signs of Life in Acid-Washed Rocks
Clues to early terrestrial life may be entombed in ancient sedimentary rocks, if only acid vapor can unveil their fossil shapes.
Earth's Oldest Mineral Grains Suggest an Early Start for Life
The hills of Western Australia are home to zircons nearly four-and-a-half billion years old. The tiny crystals may change our understanding of the newly-formed Earth.
Genomics Meets Geology
Chemist Steven A. Benner and his colleagues are combining chemistry, geological history and paleontology in an approach aimed at better understanding of life on Earth.
Did Tectonics Get an Early Start?
A recent discovery near the Great Wall in China adds new support to the theory that plate tectonics began very early in the Earth's history.
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