Photo of the Day 298

Tiny Snails, Cuatro Cienegas, Mexico, 1995

A cluster of tiny aquatic snails sits in a freshwater pool, called a poza, in Mexico’s Cuatro Cienegas Biosphere Reserve. This isolated region, a spring-fed wetland in the middle of the Chihuahuan Desert, has given rise to some of the most uniquely adapted flora and fauna on Earth.

(Photo shot on assignment for, but not published in, "Cuatro Cienegas: Mexico's Desert Aquarium," October 1995, National Geographic magazine)