When you observe a solar eclipse—with great care, of course—what you see is a thin, red crescent outlining the blocked-out Sun and, extending beyond it, a stark white mane. This is the corona, an aura millions of miles thick of superheated plasma. It’s natural to assume the corona is cooler than the sun’s blazing surface. […]

Milton Wainwright believes he’s seen ET. In Earth’s upper atmosphere, he claims to have found evidence for panspermia—the hypothesis that life travels through the cosmos via meteoroids and other objects. A microbiologist and astrophysicist at the University of Sheffield, Wainwright sends large balloons up to the stratosphere, as high as 25 miles above the planet’s […]

On a chilly afternoon last October, at a University of Northern Arizona conference, Thomas Whitham, a plant geneticist, proposed a plan to save hundreds of species from extinction. For the last several years, Whitham said, he and his colleagues had used a series of experimental gardens to study how plants are being affected by warming […]

We know when people usually get married. We know who never marries. Finally, it’s time to look at the other side: divorce and remarriage. The chart below shows cumulative rates for different groups of people in the United States, based on 2014 American Community Survey, 1-year estimates. For example, by age 60, among the employed in 2014 […]

Humans have marvelous powers of recognition. No one’s surprised when parents identify their child in a crowd by a glimpse of her face or echo of her voice. But we aren’t unique in this regard. Other creatures have evolved impressive powers of discrimination. Take birds. “Their recognition system is really quite remarkable,” says Mark Hauber, […]

Animals are struggling to cope with the US-Mexico border wall.