The Earth’s inner core was once molten liquid and then solidified. New research suggests that may have happened much more recently than we thought.
The moon may have gotten its distinct pockmarked appearance more recently than you think.
Many research projects and departments grind to a halt, from food inspections to scientists who can no longer monitor their data.
New Horizons explored Pluto. Next stop? A New Year’s visit to a planetary ‘time capsule’ in the Kuiper Belt.
We recap the year in science news with Sarah Kaplan and Rachel Feltman.