We like to think of our home as a nice, smooth sphere. But mapping the Earth’s gravitational field provides a different view of the planet.

Scientists have long assumed that there’s an upper limit to the intensity of the solar winds that reach Earth. New research suggests there’s not—and the implications are alarming.

Scientists identified the first known cancer transmissible among freshwater fish in a lake that spans the US and Canada.

The FCC authorized Reflect Orbital to launch the mirror satellite Eärendil-1. “For optical astronomy, this poses an existential threat,” the European Southern Observatory said.