Can one particle explain both dark matter and the mysterious origins of matter and antimatter? Some physicists think so. They're calling the as-yet-only-theoretical object the "X particle." Physicists ...

Physicists at the world's largest atom smasher have detected a mysterious, primordial particle from the dawn of time. About 100 of the short-lived "X" particles — so named because of their unknown ...

A new study estimates that adults inhale up to 68,000 microplastic particles per day inside homes and cars, with most particles small enough to reach deep into the lungs. (Image by Nadiia Yakovenko, ...