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In the Search for Extra-Terrestrial Intelligence, called SETI, people point powerful radio telescopes at distant stars in hopes of hearing radio signals from other civilizations. But the problem comes when humans stop listening and begin to shout.

There's a lot to love about biking to work: the exercise, the fresh air, the cost savings and the benefits for the environment.

The parents of a young boy made a terrible discovery while looking through photographs they had taken of him as a baby. They noticed a white dot where a black pupil should have been.

Going Beyond TheNAT's New Bug Exhibit

The achievement is a long-sought step toward harnessing the potential power of such cells to treat diseases. But the discovery raises ethical concerns because it brings researchers closer to cloning humans.

Youth joblessness remains remarkably high across the country, threatening long-term trouble for young people's career trajectories, earning potential and the overall health of the economy.

What does evil look like? Just ask Frank Meeink, who became a skinhead at age 13, and spent years struggling with the demons inside him—the ones that caused him to pick fights for no reason, sometimes beating his victims senseless. It took incarceration to help him turn his life around, a life that was captured in the film, American History X.

The holiday season data breach at Target that hit more than 70 million consumers was part of a wide and highly skilled international hacking campaign that's "almost certainly" based in Russia. That's according to a report prepared for federal and private investigators by Dallas-based cybersecurity firm iSight Partners.

The standard by which a person is judged to be mentally competent enough to face execution for a crime will be reviewed by the U.S. Supreme Court, which agreed Monday to hear a Florida case revolving around that issue.

The U.S. Navy's expanded use of sonar in training exercises along the West Coast will be reassessed after a federal judge found that regulators failed to consider the long-term effects of the ongoing activities on whales and other ocean life.