Imagine looking up at the night sky and learning that a black hole is racing toward Earth at nearly the speed of light. Not a ...

Looking Up is transcribed using a combination of AI speech recognition and human editors. It may contain errors. Please check the corresponding audio before quoting in print. This transcript may ...

Black holes are points in space that are so dense they create deep gravity sinks. Beyond a certain region, not even light can ...

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 ...