Video: A Look at DNA and Proteins

'Bath Salts' Posing Danger?

Legal drug can cause a phenomenon said to make a person act like a wild animal.

Florida Man Killed in Face-Chewing Attack

Rudy Eugene, 31, was fatally shot by police during attack on homeless man.

Drew Barrymore Ties the Knot?

Rachel Smith explains what has people buzzing on the "GMA" Pop News Heat Index.

Mubarak Sentenced to Life

Former Egyptian president sentenced to life for crimes against his own people.

Mother Drives with Baby Strapped to Car Roof

The baby is fine after the car seat fell off the roof into an intersection.

George Zimmerman Ordered Back to Jail

Judge revoked Zimmerman's bond over allegations of courtroom lies.

Homeless Man Beating: Video Shown in Court

Two California police officers could be tried for the death of Kelly Thomas.

Americans Will Face Criminal Trial in Egypt

U.S. and Egypt relations sour over prosecution of non-profit workers.

New Test Shows Great Promise For Cancer Patients

Dr. Kim discusses a new test that can guide treatment decisions for patients.

Man's Beating Caught on Tape

Two N.J. men are arrested after posting video of the alleged attack online.

George Zimmerman's Bond Revoked

Judge orders accused Trayvon Martin shooter to surrender himself in 48 hours.

Kathie Lee Gifford's Big Mistake

Kathie Lee questioned Martin Short about his wife -- who died two years ago.

2 American Women Kidnapped in Egypt

Women and their tour guide were kidnapped while traveling to the Red Sea resort.

2011: Tough Year for Dictators

A number of the world's most infamous dictators are no longer in power.

2004: Transit of Venus

June 8, 2004: Twice a century, Earth, Venus and Sun align. Ned Potter reports.