The hummingbird is the ultimate paradox here. For a long time, scientists thought their tongues worked like simple drinking straws using capillary action.

High-speed micro-photography revealed the actual mind-blowing mechanism: their tongue is essentially an elastic fluid trap. The microscopic structure consists of two tubes that remain tightly closed until they hit the nectar. The moment they make contact, the tips instantly unzip and expand, trapping the liquid using elastic energy rather than suction. When the tongue pulls back, it zips shut, locking the nectar inside. It allows them to load up on fluid at a speed that seems physically impossible for their body size.