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Most neuroscientists believe that the brain learns by rewiring itself—by changing the strength of connections between brain cells, or neurons. But experimental results published last year, from a lab at Lund University in Sweden, hint that we need to change our approach. They suggest the brain learns in a way more analogous to that of […]

My wife can’t seem to walk for a half-hour around Ottawa, a city with nearly a million people, without running into at least three of her friends. Some people, like my wife, seem to have a zillion of them, while others appear to be content with just a handful. Having more friends seems like a […]

In the span of nearly 5 years, Uber has gone from a limited launch in San Francisco to offering rides in more than 300 cities worldwide. In China alone, despite existing in a legal gray zone, the company claims it arranges 1 million rides per day. That means 35 Chinese people hop into an Uber […]

What do the Volkswagen diesel scandal and the European migrant crisis have in common? They’ve both been referred to as the “tip of the iceberg.” The popular expression reflects the fact that, as impressive as the visible portion of an iceberg is, the vast majority of it (usually about 90%) is underwater. Over the past […]

Warriors among the Kwara’ae, a collection of tribal communities indigenous to the Solomon Islands, sacrificed pigs before battle. The tradition granted the combatants, so the belief went, aid from heroic ancestral spirits—like the mighty A’orama, a fierce fighter in Kwara’ae folklore. For every man who prepared to shed blood, a hog met its end.1 Any […]

A physicist at the National Institute of Standards and Technology once said, “If somebody sneezed on [the] kilogram standard, all the weights in the world would be instantly wrong.” He was referring to a cylinder, sometimes called Le Grand K, which is housed in a vault in Paris and handled like a priceless gem. The […]

Out in the clear waters near the Great Barrier Reef, a common blanket octopus male swim toward a female. This male need not worry about showing his brightest colors or engaging in a showy battle of strength in hopes of winning the female’s permission to approach. In fact it’s unclear if the female even notices […]

Robert Boyle, a founding member of the Royal Society, was part of an “invisible college” of natural philosophers and physicians who lived by the motto: “nullius in verba,” or, “nobody’s word for it.” This gang of 17th century intellectual rebels questioned the dominant views of the time and stuck by the principle that truth could […]

Over 10 years ago, a digital experiment called Second Life launched, and excitement surged about the idea of interacting in online virtual worlds. Created by Linden Lab, a company founded by Philip Rosedale, the platform gained popularity as people swarmed to participate in a new form of social connection. But, Second Life’s period of rapid […]

When Hurricane Sandy destroyed much of the New York and New Jersey coastlines, in October 2012, the looming threat of climate change abruptly became personal for a large portion of the East Coast—specifically Miranda Massie, a former public-interest lawyer. Seeing her city wasted, she realized that there was nowhere for the public to assemble and […]