How do mushrooms release spores so efficiently?

In many gilled mushrooms, spore release begins with a microscopic droplet forming at the spore base. When that droplet merges with another film of moisture, the sudden shift in surface tension creates a tiny but powerful movement that knocks the spore off the gill. Once released, the spores are carried by air currents away from the parent mushroom. This mechanism, called the Buller’s drop process, was described in the 20th century and is a striking example of a biological catapult at microscopic scale.