The village of San Antonio de los Cobres is high in the Argentinian Andes. The groundwater is contaminated with arsenic, and the people local to the region may have adaptations to its poisonous presence.
Forest tent caterpillars, like this one resting on an aspen leaf, are found in U.S. hardwood forests. A new study finds that when carbon dioxide levels are higher, herbivorous insects eat more vegetation.
courtesy of John Couture, UW-Madison
Pigeons weigh danger, stability and efficiency in the aerial acrobatics they use to avoid obstacles, study shows.