The earliest predators appeared on Earth 480 million years ago — and they even had teeth which were capable of repairing themselves. A team of palaeontologists have been able to …read more Source:: Science
Tag: million
No safe level of alcohol, new study concludes
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•There is no safe level of drinking alcohol, concludes a new study. It shows that in 2016, nearly 3 million deaths globally were attributed to alcohol use, including 12 percent …read more Source:: Science
The end-Cretaceous extinction unleashed modern shark diversity
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•A study that examined the shape of hundreds of fossilized shark teeth suggests that modern shark biodiversity was triggered by the end-Cretaceous mass extinction event, about 66 million years ago. …read more Source:: Science
Our human ancestors walked on two feet but their children still had a backup plan
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•More than 3 million years ago, our ancient human ancestors, including their toddler-aged children, were standing on two feet and walking upright, according to a new study. …read more Source:: Science
What caused the mass extinction of Earth’s first animals?
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•Fossil records tell us that the first macroscopic animals appeared on Earth about 575 million years ago. Twenty-four million years later, the diversity of animals began to mysteriously decline, leading …read more Source:: Science
Prehistoric teeth dating back two million years reveal details on Africa’s paleoclimate
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•New research shows that the climate of the interior of southern Africa almost two million years ago was much wetter than the modern environment. This first extensive paleoenvironmental sequence for …read more Source:: Science
When the dinosaurs died, so did forests — and tree-dwelling birds
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•Sixty-six million years ago, the world burned. An asteroid crashed to Earth with a force one million times larger than the largest atomic bomb, causing the extinction of the dinosaurs. …read more Source:: Science
‘Snowball Earth’ resulted from plate tectonics
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•About 700 million years ago, the Earth experienced unusual episodes of global cooling that geologists refer to as ‘Snowball Earth.’ Geologists now suggest that those major climate changes can be …read more Source:: Science
Earth’s orbital changes have influenced climate, life forms for at least 215 million years
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•Every 405,000 years, gravitational tugs from Jupiter and Venus slightly elongate Earth’s orbit, an amazingly consistent pattern that has influenced our planet’s climate for at least 215 million years and …read more Source:: Science
Crowdsourced family tree yields new insights about humanity
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•Researchers have amassed a family tree of 13 million people to trace the last 500 years of Western marriage and migration patterns. They also show that the genetic basis of …read more Source:: Science