News tagged with molecular clock

Dino-killing asteroid sped up bird evolution

Human activities could change the pace of evolution, similar to what occurred 66 million years ago when a giant asteroid wiped out the dinosaurs, leaving modern birds as their only descendants. That's one conclusion drawn ...

dateSep 21, 2017 in Evolution
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Just how old are animals?

The origin of animals was one of the most important events in the history of Earth. Beautifully preserved fossil embryos suggest that our oldest ancestors might have existed a little more than half a billion years ago.

dateMay 30, 2017 in Archaeology & Fossils
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Shedding light on the day-night cycle

New research sheds light on how the rhythms of daily life are encoded in the brain. Scientists at Washington University School of Medicine in St. Louis have discovered that different groups of neurons, those charged with ...

dateMar 01, 2016 in Cell & Microbiology
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When humans split from the apes

When and where did humans split from the apes to become a separate branch of bipeds? Are we an ape or not? If so, which of the living Great Apes is the closest to humans?

dateFeb 22, 2016 in Evolution
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