Two possibilities exist: either the Universe is finite and has a size, or it’s infinite and goes on forever. Both possibilities have mind-bending implications. In another episode of Guide to Space, we ...

Forbes contributors publish independent expert analyses and insights. I write about physics, science, academia, and pop culture. A black hole is an object so compact (usually a collapsed star) that ...

Math enthusiasts around the world, from school kids to rocket scientists, are celebrating Pi Day today, March 14 – or 3/14, also the first three digits of an infinite number with many practical uses.