(THE CONVERSATION) In the four months since he began serving as secretary of the Department of Health and Human Services, Robert F. Kennedy Jr. has made many public statements about vaccines that have ...

World’s oldest fungi, found in fossils, may rewrite Earth’s early history. Fungal fossils, hundreds of millions of years older than previously known, shed light on the evolution of fungi ...

How a public health crisis nearly derailed the American Revolution. George Washington confronted a smallpox epidemic with a belief in science—and a controversial plan.