theory of General Relativity
A New Theory Unifies Dark Matter and Dark Energy as a ‘Dark Fluid’ With Negative Mass
Can one of Einstein’s forgotten theories solve the riddle of why 95 percent of the stuff in the universe appears to be missing?
humans of the year
One of the Greatest Cosmic Mysteries Was Solved By David Shoemaker’s Device
LIGO's detection of gravitational waves was an achievement comparable to Galileo’s telescope. Meet the man whose team built the detector.
What Is a Gravitational Wave Detector, and Why Do We Want to Send One to Space?
ESA is getting ready to launch LISA Pathfinder, a mission that will test the technology for a million-kilometer-large gravitational wave detector.
Explaining Reality Starts with This Souped-Up Future Machine
If it works.