BARE BONES Differences between the skeletons of modern humans (back) and Neandertals (front) may stem from the way the groups use some genes involved in bone growth. Chemical modifications of DNA may have dialed down the activity of these genes in Neandertals, leading to stocky frames.
© Sabena Jane Blackbird/Alamy
James Harden of the Houston Rockets might earn some of his attractiveness from his beard as well as his ball-handling skills.
Game Face/Wikimedia Commons (CC BY-SA 2.0)
WALK IT BACK A new analysis of 3.6-million-year-old footprints excavated in 1978 at Laetoli, Tanzania, challenges the argument that early hominids strode in much the same manner as people today do. Shown is a cast of two of the 70 footprints.
Tim Evanson
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