Green-glowing Venus flytraps reveal their memory tricks

Venus flytraps have a pretty good short-term memory for a plant. An insect has to tickle its sensory hairs twice within around 30 seconds for the carnivorous plants to close its leaves around the bug. To understand how Venus flytraps, which sadly lack brains, can "remember" when the bug first tickled them, scientists genetically engineered them to glow green in the presence of calcium, suspected to be the primary chemical agent involved in the process. — Read the rest