Health

March 10, 2010, 2:27 p.m. by Meredith Darlington

Video: Uncovering the molecular secrets of what makes us tick.

March 3, 2010, 3:09 p.m. by Jeffrey Davis

Who needs natural selection? Our fast-paced lives and cultural adaptations may be drastically speeding up our own evolution.

February 23, 2010, 6:23 a.m. by Samantha Johnson

Video: State Senate Majority Leader Dean Florez of California, who introduced a soda tax bill, explains why it's necessary to fight obesity.

February 22, 2010, 1:55 p.m. by Samantha Johnson

Video: The Dailybeast.com holds the Couch Potato Olympics. Msnbc's Alex Witt talks with fitness expert Denise Austin.

February 18, 2010, 1:08 p.m. by Samantha Johnson

Video: A new report offers a detailed look at the nation's health from pre-natal care to the availability of health food grocery stores. NBC's Tracie Potts reports.

February 15, 2010, 5:49 p.m. by Bryan Nelson

The gene is shared by humans and ancestral metazoans, and it could reveal important clues about what causes cancer.

February 12, 2010, 2:59 p.m. by Jeffrey Davis

Everyone loves a sweet treat every now and then, but new research shows that an abnormally strong sweet tooth in children may be a precursor to alcoholism.

February 12, 2010, 11:46 a.m. by Katherine Butler

New research suggests Botox injections may hinder a patient's recognition of anger, sadness.

February 4, 2010, 5:31 a.m. by Julie Knapp

Even with hours of rigorous training daily, many top Olympic athletes find time to help the environment, too.

February 3, 2010, 12:40 p.m. by Shea Gunther

Oil refineries provide one of the building blocks of modern life, but they belch all kinds of pollution in the process.

February 1, 2010, 1:48 p.m. by Samantha Johnson

Video: Jared Dienst, along with parents and NBC's chief medical editor, Nancy Snyderman, speak with TODAY's Matt Lauer about the difficulties of diagnosing a child who is suffering from a stroke.

February 1, 2010, 1:25 p.m. by Samantha Johnson

Video: Inspired by her recent assignment in devastated Haiti, NBC's chief medical editor Dr. Nancy Snyderman explains the power of simplicity to TODAY's Matt Lauer.