Tadalafil kept muscle precursor cells multiplying, but delayed their transformation into mature muscle fibers.

A startling date reveals the strange, complicated lives of dogs in an empire before the Incas.

Naturalists thought they'd found a spider killed by a parasitic fungus. Then it moved.

Scientists discovered that psilocybin can make one of nature's most aggressive fish surprisingly mellow.

Tiny mushroom peptides could help food taste salty without adding more sodium.

Clay tablets reveal why schoolwork doubled as worship in ancient Babylonia.