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Just this month, two young, high-profile public figures announced that they have cancer. First, Olivia Munn, 43, disclosed that she was treated for breast cancer after catching it early. Days later, Kate Middleton, 42, announced she has been receiving treatment for an unspecified form of cancer. Their diagnoses spotlight a troubling trend: both in the U.S. and around the world, cancer diagnoses are growing more common among adults younger than 50. By 2030, one recent study estimated, the number of these early-onset cancer diagnoses could increase by roughly 30% worldwide—and the number of people who die from their conditions could rise by about 20%.“The most striking finding in the last decade has been this rise in incidence rates among young adults,” says Ahmedin Jemal, senior vice presid...

March 25, 2024 9:45 PM EDTPuerto Rico declared a public health emergency over dengue, a mosquito-borne illness that has surged throughout the Americas this year.Read More: Dengue Fever Is Soaring Worldwide. Here’s What to Know—and How to Stay ProtectedHealth officials in Puerto Rico have identified 549 cases of dengue across the U.S. territory of 3.2 million people, with almost half the cases concentrated in the capital of San Juan. Also known as “breakbone fever,” dengue can cause headaches, soreness, fever and rashes—and, in extreme cases, death. “This year, cases of dengue have surpassed historical records,” Health Secretary Carlos Mellado said in a statement. The emergency declaration has no immediate impact on travel to or from Puerto Rico, a popular holiday destination, but it will m...

In the 1800s, a French Canadian named Alexis St. Martin was shot in the stomach while at a fur trading post, when someone’s musket accidentally fired at close range. He survived, but his injuries resulted in a hole in his stomach wall. This provided an early window—literally—into how our emotions and mental health affect the gut. Through careful experiments, the surgeon William Beaumont discovered that St. Martin’s mental state had direct physiological consequences on his stomach’s activity: when he felt irritable, for example, his digestion slowed. Somehow, his emotional states were manifest in the specific, local biology of his gut.Most people have experienced the gut consequences of their emotional feelings. Nerves before an exam might lead you to feel nauseous or even vomit. Profound s...