Scientists at the Large Hadron Collider near Geneva celebrate after the particle accelerator started smashing protons at record energies earlier today. Fabrice Coffrini/AFP/Getty Images hide caption

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Scientists altered people's perceptions of right and wrong by applying magnetic stimulation to the brain. The study is part of a larger effort by scientists to explain the mechanics of how the brain makes moral judgments. hide caption

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The fossil finger was found in a cave in the Altai Mountains of Siberia. Whoever that finger belonged to was neither human, like us, nor Neanderthal, the only other member of the human line known to be living in Europe at the time. Courtesy of Bence Viola hide caption

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Scientists have discovered that at 7 months old, children respond to human voices and emotions in much the same way adults do. hide caption

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Five fossilized human skulls show how the shape of the early human face evolved: (left to right) Australopithecus africanus, 2.5 million years old; Homo rudolfensis, 1.9 million years old; Homo erectus, 1 million years old; Homo heidelbergensis, 350,000 years old; Homo sapiens, 4,800 years old. Scientists believe that climate change had a major impact on the development of early humans. Chip Clark, Jim DiLoreto, & Don Hurlbert/Smithsonian Institution hide caption

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DNA analysis showed that most dogs share genetic markers with Middle Eastern gray wolves, like this one photographed in Israel. Courtesy of Nadav Perez hide caption

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