Evolution Keeps Repeating Itself. Scientists Are Starting to Understand Why
Species that aren't closely related can look identical thanks to a bizarre trick of evolution. A new study reveals part of the mechanism for creating nature's unrelated twins.
A Link Between Dark Matter and Antimatter Could Be Why the Universe Exists
In a new experiment, scientists probed a theory that suggests a weird interaction between two of the biggest mysteries in physics could be why our universe exists in the first place.
Twitter Is Banning Political Ads
Twitter CEO Jack Dorsey announced that the social network will not accept political ads starting on November 22, and promised more details when the final rules are published in two weeks.