New Yorkers are helping scientists catalog the city's wild plants, one photo at a time...

Scientists have discovered that birds can learn to recognize alarm calls of other species, essentially by learning to eavesdrop in a second language...

Whale researchers are keeping close watch on an endangered orca that has spent the past week carrying and keeping her dead calf afloat in Pacific Northwest waters...

Microbes in soil release more carbon into the air, worsening climate change...

The first calf born in three years to the endangered orcas that spend time in Pacific Northwest waters has died...

Scientists say they've detected water beneath the surface of Mars, raising the possibility of life on that planet...

A Milwaukee County jail supervisor who ordered the water turned off in a cell leading to the dehydration death of a mentally ill inmate is headed to trial...

A man who was perhaps the foremost expert on the iconic monarch butterfly has passed away...

AP-NORC Poll: Curiosity about ancestry is the main reason Americans seek DNA testing but many also want to know if they're at risk for disease...

An invasive species of plant in Vermont left an Essex woman with severe burns and blisters...