Physicists Have Finally Seen Traces of a Long-Sought Particle. Here’s Why That’s a Big Deal.

By Meredith Fore Scientists have finally found traces of the axion, an elusive particle that rarely interacts with normal matter. The axion was first predicted over 40 years ago but has never been seen until now. Scientists have suggested that dark matter, the invisible matter that permeates our universe, may be made of axions. But rather than …