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For feathered dinosaurs the late Cretaceous period may have been a very itchy time. Lice--the tiny wingless insects that feed on dead skin, and sometimes blood--were just beginning to dig in about 100 million years ago, and the epoch's small furry mammals, early birds and dino-birds would have provided ample food. The louse fossil record is relatively sparse

This article is part one of a two part series. In part two, we will look at what small businesses should know. Jack Plunkett is the CEO of Plunkett Research .

Bombs away! Scientific American Editor George Musser and his daughter Eliana simulate a meteor shower using nuts, cake mix and common kitchen items.

Mississippi River flooding is at its worst in decades. With thousands evacuated and the levees breaking, the Army Corps of Engineers has begun an audacious Facebook initiative to keep the public informed.

When someone divides a complex phenomenon into two basic categories, he invariably oversimplifies and distorts reality.

If you want to guess how many jelly beans are in a jar, you should ask your friends.

Titan, Saturn's largest moon, has numerous lakes and seas. But they're not bodies of water--Titan's reservoirs are full of liquid hydrocarbons such as methane.

Editor's Note: The following blog post first appeared May 15 on the World Science Festival's Web site [More]

By James Mitchell Crow of Nature magazine The hole in the ozone layer over Antarctica is starting to heal, say researchers in Australia. [More]

Key concepts Gravity [More]

After seven hours of dragging a metal trawl in the ocean, we pulled the manta ray-looking contraption on board--salt water splashing everywhere--to see what was inside. We reached into the slimy net, flipped it inside out and dumped the contents onto a mesh screen.

When genetically engineered, the Long Evans Hooded rat (center) and the Sprague Dawleys may help cure cancer. Not bad for a rodent

“They had big antennae and wires going everywhere,” says Progressive’s Richard Hutchinson of Snapshot predecessors. The device is now roughly the size of a deck of cards

Sarasa Satish is a waste picker. Every morning, she starts promptly at 8:30 a.m. going door to door, collecting throwaway materials from houses in the Rajendra Nagar slums of Bangalore, India

By Mari Saito and Kevin Krolicki TOKYO, May 16 (Reuters) - The magnitude 9 earthquake that [More]