Relativity

Charles Liu, astrophysicist at the American Museum of Natural History, answers questions submitted to our YouTube Space Lab Channel

This video made me laugh harder than anything I’ve seen in a long time. Okay, except for some Louis CK videos. But for a non-comedian (allegedly)… this is hard to beat.

A decades-old paradox returns

Yakov Sinai has developed fundamental tools for the study of unpredictable phenomena

Everyone needs a little light relief sometimes, including the Nobel winning economist and writer/blogger extraordinaire Paul Krugman. A few months back he reminded the world of a short paper he’d written some years ago on the rather unexpected topic of interstellar finance.

Theoretical cosmologist Sean Carroll answers questions submitted to our YouTube Space Lab Channel

If particles of light have mass, a small but distinct possibility, they may not live forever—and some fundamental theories would have to be modified, too

A newly discovered magnetized neutron star could be used to test Einstein's general theory of relativity

New calculations extend Einstein's general theory of relativity into the universe's first few moments

A framework that relies on college-level mathematics could describe what happens to particles in so-called spacetime rips, gravity fluctuations such as those that occur during the birth of a black hole

Newly developed optical clocks are so precise that they register the passage of time differently at elevations of just a few dozen centimeters or velocities of a few meters per second

Cosmic inflation may have left a telltale imprint on the universe that could be detected in the coming years