Is spacetime a fabric of the universe, or is there something deeper?Shutterstock/Mohd.Afza How is our physical reality structured? Physicists have long imagined that space and time…
Billions, perhaps trillions of years from now, long after the sun has swallowed the Earth, cosmologists predict the universe will end. Some people wrestle with whether…
We can detect signals from black hole mergers, but can we also detect signatures of more exotic collisions?Victor de Schwamberg / Science Photo Library Gravitational wave…
Gravitational wave detectors use laser beams in tubes that span several kilometers.Virgo Collaboration Gravitational waves, which span thousands to billions of miles, can be hidden by…
Shutterstock/Creative Touch A century ago, it was possible for a physicist to know almost everything there is to know about physics. Now, however, that is not…
NASA’s New Horizons spacecraft in deep spaceNASA, APL, SwRI, Serge Brunier (ESO), Mark Postman (STScI), Dan Dardah We finally know just how dark deep space is:…
Gravitational waves are vibrations of space-time itselfPeter Jurick/Alamy The following is an excerpt from the Lost in Space-Time newsletter. Every month, we hand the keyboard to…
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