Trilobites: The Scuba Diving Flies of California’s Mono Lake

For most insects, water is a death trap. These alkali flies cover themselves with a bubble of air to dip into a salty lake.

Daily Challenge in Puerto Rico: Finding Enough Bottled Water to Drink

By CAITLIN DICKERSON October 12, 2017 SAN JUAN, P.R. — After a day spent working in an office in the dark, without air-conditioning, Iris Díaz arrived at her neighborhood CVS drugstore desperate for what has quickly become one of the most...