Photo: Locust Swarms Switched On by Brain Chemical

Email to a Friend << Back to Full Story


Locusts display different colors when they are driven to be gregarious (left) or solitary.

A January 2009 study says that the insects go from loners to swarm-lovers due to serotonin, a brain chemical found in most animals.

Picture courtesy Tom Fayle

MOST VIEWED NEWS

"Lost" Amazon Complex Found; Shapes Seen by Satellite

Earliest Known Galaxies Spied in Deep Hubble Picture

PICTURES: Tigers Butchered for Trade at "Zoos" in China
NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

Today's National Geographic Photo of the Day

• Today's Photo

• Download as Wallpaper

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.