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Radiocarbon dating dinosaur bones clip

John Grotzinger has devoted his career to solving one of the most hotly debated mysteries in evolutionary biology-what happened hundreds of millions of years ago to cause the spontaneous burst of life that spawned the early ancestors of all animals on earth today. He returned to MIT in January after a year spent in the Middle East, where he collected fossil-containing rocks dating back to this so-called Cambrian Explosion. According to the fossil record, life on earth arose 3. For close to three billion years, the planet was devoid of anything larger than bacteria, plankton, and microscopic seaweed. Then suddenly, about million years ago, in the dark depths of the ocean, a rich community of tiny animals sprang into being. From long spiny worms to five-eyed creatures with grasping hoses for mouths, they completely transformed the ocean floor about 10 million years ago-the blink of an eye in evolutionary time.
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Radiocarbon dating dinosaur bones clip
Radiocarbon dating dinosaur bones clip
Radiocarbon dating dinosaur bones clip
Radiocarbon dating dinosaur bones clip
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Neanderthal 1 - Wikipedia

In the fossil 's description was first published in a scientific magazine and officially named. However, the find was not the first Neanderthal fossil discovery. Rather, the true nature and significance had not been recognized on any of the earlier fossils, and therefore no separate species' name was assigned. The discovery was made by limestone quarry miners.
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Neanderthal 1

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