Christopher JoyceChristopher Joyce is a correspondent on the science desk at NPR. His stories can be heard on all of NPR's news programs, including NPR's Morning Edition, All Things Considered, and Weekend Edition.
Invasive brown tree snakes have gobbled up most of Guam's native forest birds. Without these avian predators to keep their numbers in check, the island's spider population has exploded.
Isaac Chellman/Rice University
Craig Allen, left, a research ecologist with the U.S. Geological Survey, and Jorge Castro, a visiting professor of ecology from Spain, survey a plateau ravaged during last year's Las Conchas fire in New Mexico. The megafire burned over 150,000 acres of forest.
Jorge Castro, a visiting professor of Ecology from Spain, sips water in the shade of a burnt tree in New Mexico's Bandelier Wilderness area. Last year's Las Conchas fire devastated the area burning over 150,000 acres of forest.
Experts say glass buildings kill millions of birds every year. Scientists at Powdermill Avian Research Center are studying ways to help prevent this. Here, a volunteer tags a black hooded warbler in Rector, Pa., in May.
Displayed in the hand of University of Oregon archaeologist Dennis Jenkins are three bases for western stemmed projectiles from the Paisley Caves in Oregon. The bases date to some 13,000 years ago.
A water tank truck is seen on the main street in Waynesburg, Pa., on April 13. Scientists say naturally polluted water can rise to the surface of the Marcellus Shale; that finding suggests that frack water could seep out, too.
Mladen Antonov/AFP/Getty Images