Microswimmers make a splash | Science News

SUPPORT SCIENCE NEWS

Help us keep you informed.

Real Science. Real News.


Feature

Microswimmers make a splash

Tiny travelers take on a viscous world

By
2:10pm, June 19, 2009

Michael Phelps, one of the greatest swimmers of all time, propels himself forward by hurling water behind his body. If he were the size of a bacterium, though, that strategy wouldn’t make much of a splash. In a microworld Olympics, Phelps would go home medalless.

At tiny scales of 10 micrometers and below, life is largely conducted as if in a thick fluid, where every motion is immediately dampened by the highly viscous muck. Here, where water seems to take on the consistency of honey, the coasting inertia that helps carry Phelps through the water is simply nonexistent.

“It’s like looking at a completely different world,” says Piotr Garstecki, a physicist at the Institute of Physical Chemistry at the Polish Academy of Sciences in Warsaw.

Many microbes spend their whole lives swimming, and it’s not to win Olympic gold. They make their way through the thick morass to find food, locate mates and seek out or avoid light. But exactly h

This article is only available to Science News subscribers. Already a subscriber? Log in now. Or subscribe today for full access.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content