A Dandelion Clock

 When a Dandelion sets seeds the flower turns into a mass of seeds, known as a Dandelion Clock.

Each seed is suspended from a parachute-like stalk, which young children soon discover are easily released by a puff of breath. This "parachute" allows the seed to be wafted quite long distances from the parent plant.

But the surprising thing is that it was not until 2018 that anyone knew exactly how these "parachutes" worked.

 Here is a link the the article in Nature, on 17th October 2018