A surprising and rare particle decay has left scientists puzzled as kaons, particles made up of quarks, are decaying in ways that defy current physics models. Could this anomaly indicate the existence ...

An Oklahoma man is in full remission after doctors diagnosed a rare autoimmune brain disease following years of unexplained symptoms and misdiagnoses. An estimated 25 to 30 million Americans live with ...

After half a century of puzzling over a handful of unexplained transfusion reactions, researchers have finally traced the problem to something hiding in plain sight: an entirely new blood group system ...