Browsing: Blog

Gregor Hintler had what seemed like a simple question: How many trees are there? As part of Plant for the Planet, a youth initiative that aimed to plant one billion trees in every country by 2020, he needed a way to figure out how many trees the planet could fit. But when he tried to […]

Georg Cantor died in 1918 in a sanatorium in Halle, Germany. A pre-eminent mathematician, he had laid the foundation for the theory of infinite numbers in the 1870s. At the time, his ideas received hostile opposition from prominent mathematicians in Europe, chief among them Leopold Kronecker, once Cantor’s teacher. In his first known bout of […]

One April day in 2013, the submersible Shinkai 6500 descended to the base of the steep São Paulo Ridge, 13,000 feet under the Atlantic Ocean. “Hang on,” Paulo Sumida, a marine biologist, radioed to the submersible pilot from the support vessel on the ocean’s surface. “Those are whale bones.” In fact, they were frozen vertebrae of […]

Hope Jahren, a geobiologist and geochemist, wants to speak to you. For decades, she says, she’s been speaking to the same people, her scientific peers, and now it’s time for a change. “I wanted to write this book”—her memoir, Lab Girl, published today—“in order to talk to somebody new,” she told Nautilus recently. Her subject? […]

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 […]

Before her accident Heather Thompson was, by any measure, very successful. She lived just outside Seattle’s urban sprawl, was a CEO and a nationally respected business strategist, married, and had a two-year-old daughter. “I was at the pinnacle of my career,” she said. Then, on March 6, 2011, Thompson went to the grocery store and, […]

When Carl Sagan, the late astronomer and original Cosmos host, published his first novel, Contact, in 1985, Studs Terkel, the long-time radio broadcaster, asked him a month later to chat with him. Their subject, of course, was aliens, and the question of whether we’d ever establish good relations with them. In their conversation—which Blank on Blank, […]

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 […]