Tomatoes sense the attacks of parasitic vines by the proteins they secrete.
F_A/Flickr (CC BY 2.0)
RUN AWAY When predatory snakes take a bite out of clusters of unhatched red-eyed tree frog embryos, some manage to escape the slaughter by wriggling out of their eggs to safety.
Karen M. Warkentin
FLASH OF LIGHT People were able to detect single photons in a recent study, indicating that human eyes are sensitive to individual particles of light.