In the Dec. 9 SN: Lessons from the Pliocene, searching for new ways to fight MS, a supernova on repeat, the great gene drive debate, spider sleep secrets, an ailing boy gets new skin, kleptopredation and more.
NOT LIKE HOME Rocky super-Earth 55 Cancri e, seen in this artist’s illustration, is about Earth’s size, but a new study suggests it and other similar hot exoplanets probably formed in a completely different way than Earth did.
Hubble, ESA and M. Kornmesser
OPEN MIND David Kipping has made a name for himself by taking risks and accepting failure.
SLOW FADE Tabby’s star dims strangely over the course of days and years. Explanations have ranged from a destroyed planet to a ring of debris (shown in this artist’s illustration), but new studies suggest that clouds of dust or a strange stellar cycle might be more likely.