By Rachel Feltman
Thanks to a new study, we finally know how hummingbird tongues work.
Until now, the general consensus was that hummingbirds used capillary action to sip tiny bursts of nectar. Capillary action is a force you can observe by putting a long, thin tube in a glass of water: The water will travel up through the narrow space without any suction. Scientists thought that the long, narrow grooves they saw on hummingbird tongues accomplished the same feat.
Read the full article by clicking the name of the source below.