Climate change is putting monarch butterflies’ overwintering forests in Mexico at risk. Could planting new forests solve that problem?

The annual Small World photomicrography competition, now in its 50th year, puts life’s smallest details under the microscope.

Taking in seawater while filtering out dense salts lets unicellular phytoplankton migrate tens of meters vertically toward sunnier seas.

Just a few smashups in the asteroid belt may account for 70 percent of Earth’s meteorites, limiting what’s known about our solar system’s history.

Cats can flow like liquids through tall crevices, but they solidify a bit as they approach short crannies, new research shows.

Insects stuck in sundew plants’ sticky secretions suffocate and die before being subjected to a medley of digestive enzymes.

Human sniffs last between one and three seconds. During that time, chemicals enter the nose and allow us to perceive the smells around us. But whether humans can perceive odor changes shorter than the ...

Genetic analysis of cavity crud from two famed man-eating lions suggests the method could re-create diets of predators that lived thousands of years ago.

Over her long career, Bonnie Buratti has seen the search for life in the solar system go from a joke to a flagship mission.

Participants “navigating” on a lab computer have shaped navigation knowledge. Studies that add in the environment challenge those findings.

Saturn is known for its stunning rings and its many moons (four seen here), but they aren’t the planet’s only companions. Its first known Trojan — an asteroid that shares the planet’s orbit around the ...

This first successful treatment of tumors with radioactive ion beams could one day lead to treating human patients’ tumors with millimeter precision.