From viruses to humans, life makes microproteins that have evaded discovery until now. By Carl Zimmer You could be forgiven for assuming that scientists know how many kinds of proteins exist. After ...

In Greek mythology, Proteus, son of Poseidon and prophetic shepherd of sea-beasts, could foretell the future. The elusive sea god was difficult to capture as he assumed many forms—a lion, a serpent, ...