Add Yahoo as a preferred source to see more of our stories on Google. FLAGSTAFF — As flurries started to descend on the forest floor, a team of researchers examined a stand of sickly quaking aspen ...

Pharmaceuticals that people globally rely on for daily health — including antibiotics, antidepressants and painkillers — are entering ecosystems via wastewater, posing poorly understood risks. Once ...

Moving with the speed and agility of an insect, the tiny robot could someday assist in search-and-rescue missions.

Aphids are small, soft-bodied, slow moving insects with piercing mouthparts that suck the sap out of plants. There are about 5000 different species. They are only about ¼ inch in size and can be any ...