In the April 1 SN: Digital tech on the brain, cancer’s sweet spell, elephant sleep stats, ancient stardust spotted, a hydrothermal cradle of life, nutrition in a changing climate, nesting-doll parasitism, a neutrino trio and more.
WARMING UP Hydrogen-spewing volcanoes may warm worlds chilled by the distance from their star (one illustrated above), enhancing planets’ ability to support life, a new study suggests.
W. Henning/NASA Goddard Space Flight Center
PLANETARY LINEUP Seven Earth-sized planets orbit the star TRAPPIST-1 with short periods, from 1.5 to 20 Earth days. This artist’s illustration shows potential differences in the planets’ surfaces and sizes.
HEY NEIGHBOR Proxima b, depicted with its star in this illustration, is at least 1.3 times as massive as Earth — but that is just a minimum estimate.