Some dogs can smell odors given off by humans with bladder cancer and diabetes, researchers say. In some cases, the canines warn of oncoming attacks. Video.

See a shadow slicing across Saturn's rings, a gas cloud that acts like a particle accelerator, a NASA "moving van," and more among the week's best space pictures.

A 54-million-year-old primate followed its nose, and that might help reveal why today's primates—including humans—have comparatively big brains.

The one-acre human-made cave in the Jordan Valley, thought to have begun as a quarry, may later have been converted for other uses, including a monastery or a hideout for persecuted Christians.

From glass pyramids to towers of greenhouses, see some of the concepts that architects have created for vertical farms, a proposed strategy for growing crops year-round at the hearts of urban centers.

From glass pyramids to towers of greenhouses, see some of the concepts that architects have created for vertical farms, a proposed strategy for growing crops year-round at the hearts of urban centers.

A combo of dams and sea-level rise could wipe out vast acres of the U.S. river's delta plain, according to new research that predicts the surrounding coastline will be significantly reshaped.

Mating between a native salamander and an introduced species has created a monster—at least for animals that dwell in the ponds of California's Salinas River Valley.

Pictured during a steamy moment, two apparently mating African bats are each no bigger than a human thumb, scientists report.