Signs of ancient life
Mounds of minerals discovered in Greenland appear to have been deposited by clusters of microbes 3.7 billion years ago. If so,
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, these stromatolites represent the oldest fossilized evidence of life on Earth (SN: 10/1/16, p. 7),
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.
Lucy’s big fall
A controversial study claims that Lucy,
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, the most famous fossil in the study of human evolution,
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, died after falling from high up in a tree (SN: 9/17/16, p. 16),
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. The autopsy supports the hypothesis that Australopithecus afarensis split its time between the ground and the trees,
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.
Nucleus with no charge
Researchers have spotted signs of a “tetraneutron,
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,” an atomic nucleus with four neutrons but no protons (SN: 3/5/16, p. 10). If confirmed, this first-of-its-kind nucleus might be explained by a new, interneutron force.
Tue,
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, 06 Dec 2016 22:16:38 +0000 https://www.sciencenew...earches-loom-over-physics


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