In July 2016, a group of archaeologists commissioned a small plane—along with special pilots—to fly over the thick jungle canopy in northern Guatemala, near the border with Mexico. Cruising well above the trees, the pilots combed the area, pointing three lasers at the ground that fired 300,000 pulses of light per second. Over 12 days, […]

In retrospect, it might have been a clue. But in early 2010, when Kamni Vallabh first began to complain that her eyesight was failing, there didn’t seem to be much cause for concern. She was 51; maybe middle age was catching up with her. Maybe the harsh western Pennsylvania winter—two record-breaking blizzards in as many […]

The central contradiction of climate change is that it is at once the most epic problem that our species has ever faced yet it is largely invisible to the average human. From the comfort of your home, you may not realize how climate change is already affecting mental health, or ripping apart ecosystems, or how […]

If only humans could drink seawater without dying, we wouldn’t find ourselves floundering in a water crisis. To not die, first you have to boil saltwater and collect the pure vapor, or get yourself a fancy membrane that filters out all the salt and, conveniently, sea life. This is the controversial idea behind large-scale desalination—great […]

This story originally appeared on Grist and is part of the Climate Desk collaboration. On a hot summer day in New York City last July, Ajohntae Dixon was studying at home when he began struggling to breathe. With no air conditioning in his apartment, the temperature inside surged, and the 15-year-old’s gasping quickly progressed into a full-blown asthma attack […]

On the second day of the Second International Summit on Human Genome Editing, the last session before lunch was already running long. But the crowd crammed into the Lee Shau Kee Lecture Centre at the University of Hong Kong wasn’t budging. Neither were the 5,500 people around the world glued to their live video feeds. […]

This story was originally published in October 2017, in the aftermath of the Napa Fire. We’ve updated it with details on the Camp, Hill, and Woolsey Fires. Friday morning, residents in the Bay Area and parts of Los Angeles County woke up to a blood-red sunrise, the smell of scorched timber and an Apple weather […]