Snow covers flowers in front of the Supreme Court building on Monday in Washington, D.C. On Tuesday, the justices hear oral arguments on the constitutionality of California's Proposition 8, which banned gay marriage. Jonathan Ernst/Reuters /Landov hide caption

Arkansas Gov. Mike Beebe speaks at a rally promoting the expansion of Medicaid in the state in front of the Capitol in Little Rock on March 7. Danny Johnston/AP hide caption

While equal rights occupy a large part of the debate over same-sex marriage, federal taxes are also a concern for gay couples. Experts say repealing the Defense of Marriage Act will affect some same-sex couples when they file their taxes. iStockphoto.com hide caption

Pam Thatcher and her family ultimately moved into her mother's two-bedroom apartment because they couldn't make rent. Courtesy Devon Terrilll/Viewfilm productions/HBO hide caption

People who are socially isolated may be at a greater risk of dying sooner, a British study suggests. But do Facebook friends count? How about texting? iStockphoto.com hide caption

A micrograph of HeLa cells, derived from cervical cancer cells taken from Henrietta Lacks. Tomasz Szul/Visuals Unlimited, Inc./Getty Images hide caption

The buttons, symbols and signs on many modern TV remotes make for one confusing user interface. iStockphoto.com hide caption

Tame Impala. Maciek Pozoga/Courtesy of the artist hide caption