Modern cosmology assumes dark matter exists. But what makes us so certain that dark matter is the answer—and what if we're wrong?

"It's all about mindset in science, where a null result can be as impactful as a positive result." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works ...

At the end of a lecture on astronomy, describing how the planets orbit the Sun, a little old lady at the back of the room stood up and said: "What you've told us is all rubbish. The world is really a ...