An electric knifefish shimmies in the water for the same reason a dog sniffs or a human glances around a new place—to make sense of their surroundings. For the first time, scientists demonstrate that ...

Authorities in India’s southern state of Kerala have issued a health alert after infections and deaths caused by a rare water-borne “brain-eating” amoeba more than doubled compared with last year.

While health officials announced that they presume the amoeba in the fatal case of Naegleria fowleri, or brain-eating amoeba, to have come from Lake Murray, the lake does not have a higher risk of ...