Black holes are mysterious objects, and one theory posits that our universe exists inside of one. It sounds strange, but ...

In 1916, only a year after Albert Einstein had published his general theory of relativity, Karl Schwarzschild used mathematical calculations to show this: If sufficient mass could be placed into an ...

"A unique opportunity to encompass the celebrated and impacting universe of Kara Walker, this publication gathers together 600+ works on paper realized by the artist between 1992 and 2020--almost all ...

Some things in cosmology may simply be unknowable. Why is there something rather than nothing? What lies outside the universe? What is inside a black hole? That last one has been niggling at ...