Scientists from the Georgia Institute of Technology (USA) called the fastest creature on our planet. The champion was a single-celled worm-like inhabitant of the rivers.
This inhabitant of fresh water with a length of only 4 mm is a simple, moves with cilia and contractions of the torso, reports vokrugsveta.
Spirostomum ambiguum can move with a speed up to 724 km/h.
Researchers still don’t know, making the simplest possible to reach such a speed.