A mathematical constant that emerges only in the unusual conditions of specific black hole systems has shown up in a simple Newtonian system. (p. 8)

New research reveals another impact of fish farming on wild stocks. (p. 18)

Southern right whales learn where to eat from mom and may not seek new feeding grounds if these favorite restaurants go belly-up.

When angiosperms diversified 100 million years ago, they opened new niches for ants, plants and frogs.

Chemical fossils in Precambrian sedimentary rock push back the first date for animal life. (p. 12)

A new study suggests that people in America’s Southwest were making cacao beverages as early as A.D. 1000. (p. 14)

A protected population of resident orcas around Vancouver Island and Puget Sound is the planet’s most PCB-contaminated mammals, says one researcher.

Darwin’s dangerous idea has adapted to modern biology (p. 21)

Study of Mt. Everest climbers shows some bodies can tolerate low oxygen levels that are toxic to others. (p. 13)

Results of most drug trials are unreported, inaccessible to clinicians and patients, a new study confirms. (p. 14)