DRY TIMES A 200-year drought 4,200 years ago that caused civilizations to collapse across the globe marks the start of the newly designated Meghalayan Age. As seen in this photo from Algeria in 2017, droughts still occur during this ongoing geologic time period.
IN THE DEEP Healthy shallow reefs, like this one in Micronesia, are at increasing risk. Researchers previously hoped that species from these reefs could survive in deeper reefs, but new evidence shows this may not be the case.
L.A. Rocha/California Academy of Sciences
BAD BURN Wildfires such as this one, which burned almost 50,000 acres in Oregon and Washington in 2017, are one reason why the days with the worst air quality are becoming even worse in the northwestern United States.