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What energy source sparked the evolution of life?Leading theories suggest that the first energy used by life was either from the sun or from geothermal heat and chemistry at the bottom of the ocean.
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Which came first: The chicken or the egg?Most biologists will answer confidently when asked "which came first, the chicken or the egg?" but the answer may depend on what type of egg you're talking about.
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Does evolution ever go backward?In regressive evolution, organisms lose complex features and can appear to evolve "in reverse." But evolution doesn't retrace its steps, experts said.
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Evolution Predictable Everywhere in the Universe, Scientist SaysIf the history of life could be rewound and replayed, many of the same innovations would reappear. What’s that mean for life on other planets?
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Teachers: Creationism Belongs in Science ClassUK survey: 29 percent of teachers there think creationism and intelligent design should be taught as science.
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Origin of Life: What Are the Odds?How life began is one of life's great mysteries.
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As Myth Marries Science, the Origin Story Matters (Op-Ed)Opinion In modern times, scientific understanding replaces myths as the origin story for humanity.
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Genome of Mysterious Extinct Human Reveals Brown-Eyed Girl... and other surprises are revealed in the Denisovan DNA.
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Charles Darwin's stolen 'tree of life' notebooks returned after 20 yearsA pair of Charles Darwin's notebooks, which were stolen in late 2000, have been anonymously returned to the library that once held them.
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