The object is about 150 feet in diameter and was discovered in images acquired on September 16, when it was about 20 million miles away.

Getting an inside look at the center of a cell can be as easy as a needle prick, thanks to University of Illinois researchers who have developed a tiny needle to deliver a shot right to a cell's nucleus

Strings a fraction of the thickness of a human hair, with microscopic weights to pluck them

Bioengineers have not only figured out a way to sneak molecular spies through the walls of individual cells, they can now slip them into the command center -- or nucleus -- of those cells, where they can report back important information or drop off paylo

A team of planet hunters has announced the discovery of an Earth-sized planet (three times the mass of Earth) orbiting a nearby star at a distance that places it squarely in the middle of the star's "habitable zone,"