The goal should not be conversion but doubt
The billionaire entrepreneur and founder of SpaceX wants to make humanity a "multi-planetary species”
Results from the Micius satellite test quantum entanglement, pointing the way toward hack-proof global communications—and a new space race
A new high-tech approach is helping paleontologists better understand the link between a set of ancient fossils and modern animals
Orbits of four newfound objects show no signs of gravitational pull from proposed giant planet
Contrary to what we now think, it could be that it came from a violent impact that temporarily turned Earth into a "synestia"
Chimpanzees have been known to cooperate when there is no foreseeable personal cost. Watch and learn whether chimps are capable of riskier, more complex forms of collaboration.