Bacteria’s tail spins make water droplets swirl
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/06/ticker_Bacillus_subtilis.jpg?fit=906%2C580&ssl=1)
The way Bacillus subtilis bacteria swim in a single drop of water can spin the fluid into a spiraling vortex.
Josef Reischig/Wikimedia Commons (CC BY SA 3.0)
The way Bacillus subtilis bacteria swim in a single drop of water can spin the fluid into a spiraling vortex.
Josef Reischig/Wikimedia Commons (CC BY SA 3.0)