Whirlwinds leave dark paths behind by sucking sand grains clean.

Researchers study how folds and other creases disappear. (p. 12)

New experiments confirm a fundamental postulate of quantum mechanics. (p. 12)

Fermilab results heat up the race for an elusive particle. (p. 16)

A mathematical analysis shows that random factors underlie the insects’ movements across the landscape.

Researchers discover a fresh meteorite impact crater using Google Earth. (p. 13)

New work is solving paradoxes by making the impossible impossible. (p. 5)

The Rosetta spacecraft returns images of asteroid 21 Lutetia.

If the subatomic particle really is smaller than thought, a cherished theory may need tweaking. (p. 7)

Science News editor in chief Tom Siegfried reports on a new image of the early cosmos from the Euroscience Open Forum meeting in Turin, Italy. (p. 15)

Instruments on a massive berg help pinpoint a previously unreported undersea ridge. (p. 15)