Scientists using a high-resolution X-ray technique found that this bone belonging to a hominin, an ancient, extinct relative of modern humans, has a malignant tumor. Patrick Randolph-Quinney (UCLan) hide caption

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Patrick Randolph-Quinney (UCLan)

The most recent common ancestor of all today's snakes likely lived 120 million years ago. Scientists believe it used needle-like hooked teeth to grab rodent-like creatures that it then swallowed whole. Julius Csotonyi/BMC Evolutionary Biology hide caption

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Julius Csotonyi/BMC Evolutionary Biology

Earth's First Snake Likely Evolved On Land, Not In Water

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