The same behavior that drives fruit flies to interrupt your picnic helps scientists understand how animals use sensory inputs to make decisions.

Caltech scientists have now identified the complex role a particular protein plays in helping stem cells develop into T-lymphocytes, powerful immune cells.

Male fruit flies display aggression in a manner similar to humans. Now, Caltech scientists have shown how the flies' threatening behavior is encoded in their brains.

Caltech researchers show how sound can retroactively induce an optical illusion.