Juliet Tuttle may have been the most prolific murderer of pets in American history. How did she get away with it?

As humans drive vulnerable mammals closer to extinction, valuable mutations hidden in their DNA could be bred out of existence.

If and when it happens, we might not know until it’s too late.

What appears to be a life-affirming triumph is really a cautionary tale about drones and wildlife.

New evidence is prompting some researchers to rethink ethics in the lab.

After my son got a brain tumor, his treatment left him unable to speak. Children’s shows that used the language program Makaton became a source of joy for our family.