The animals kill off around one-quarter of the neurons in their somatosensory cortex, perhaps to save energy, and the cells appear to return the following summer.

Environmental engineer Gil Bohrer discusses how long-term, large-scale tracking data can shed light on the unexpected ways animals are responding to changes in the Arctic.

Almost 60 percent of people in a new study on attitudes in the US felt comfortable using animals to grow human organs from induced pluripotent stem cells.

Many researchers have stopped breeding mice, reduced the size of colonies, and established contingency plans in case animal care staff get sick.

The inspection reports that had been removed a few years ago due to privacy concerns have resurfaced, pleasing animal rights advocates.

Current bills in Congress would apply similar provisions to all federal agencies.

Video taken at the Laboratory of Pharmacology and Toxicology contract testing facility appears to show mistreatment of monkeys, dogs, and cats.

The birds also decrease their heart rate and chill their blood to maintain flight in hypoxic conditions.

Many preclinical studies carried out in vivo are poorly designed and generate irreproducible data, but efforts to address the problem are on the rise.