Scientists just learned that honeybees can understand the concept of zero. That puts bees in an elite club of clever animals – some birds, monkeys, humans – that can grasp the abstract notion of nothing.
Since the 1970s, scientists have treated pulsars and magnetars as 2 distinct populations of objects. Now they think they might be stages in a single object’s evolution. A new NASA ScienceCast has more.
‘What we are witnessing is major hydrologic change,’ they said. Over 14 years, Earth’s wet land areas got wetter. Dry areas got drier. They also reported multiple hot spots resulting from groundwater depletion.