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.
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
TEAM SPIRIT A Cherokee inscription inside an Alabama cave likely refers to rituals conducted in 1828 before a spiritually significant athletic contest similar to modern-day lacrosse, researchers say.
A. Cressler, B.D. Carroll et al/Antiquity 2019
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
