Deep in the New Zealand forest, the booming thud of the kākāpō’s ancient mating ritual sounds more like a bass speaker than ...

After a four-year hiatus, conservationists in New Zealand are relieved that the flightless kākāpo is once again breeding.

These underground rodents are the first mammals found to actively choose air with lower-than-normal oxygen levels. Their ...

Dunn’s team analyzed the biological “budget” of these primates and found a direct negative correlation: males with large ...