Life & Evolution

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gram staining bacteria

COLOR CODED  An old lab technique for differentiating bacteria as either gram-positive (left) or gram-negative (right) has been incorrectly explained for decades.

seafloor map

VISITING THE RELATIVES  At a deep spot (red dot) on the seafloor between Norway and Greenland not far from the hydrothermal vents at Loki’s Castle, mud has yielded DNA samples from microbes that may be the closest kin yet known to complex life.


Forest elephants in Africa are closely related to the animals found on the savannahs, but conservation plans do not always recognize them as separate species. With elephant poaching now rampant, failing to acknowledge that there are two species African elephant could put both at risk of extinction, scientists warn.

Life & Evolution

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