In the April 13 SN: The browning of the Arctic, RNAs steal the spotlight, sensing Earth's magnetic field, a spider speed record, Bennu spits dust, a ketamine drug for depression and more.
WINDS OF CHANGE A satellite image from March 2016 shows the blue streaks of unseasonably late snowmelt on the Larsen C ice shelf that was caused by warm winds cascading down mountain slopes on the Antarctic Peninsula.
Lauren Dauphin/NASA Earth Observatory
CHEMICAL RELIC The elusive helium hydride ion, thought to be the first type of molecule to form in the universe, has been found in the planetary nebula NGC 7027 (shown in infrared light in this Hubble image).
William B. Latter/SIRTF Science Center/Caltech, NASA, ESA
SHOOTING STAR Meteors from other planetary systems may have been able to bring life to the early Earth, two astronomers suggest.
Bill Dunford/NASA
The concept of “statistical significance” has become scientific shorthand for a finding’s worth. What might science look like without it?
nicolas_/iStock /Getty Images Plus
