California's drought: Blame it on soaring demand for water
Scientists: Demand exceeds supply; this drought is anthropogenic.
Rains will return, but California's drought is permanent. More conservation is the only escape. More »
Tropical mountain diversity: species rise from below, but also travel from afarThe tallest peak in Borneo has a mixed bag of evolutionary histories. More »
Jumping on water: Water strider shows the wayThis 68-milligram invention jumps on water, imitating its insect inspiration! More »