Complicated sexual relationships abound; researcher says 'I'm glad I'm not a dolphin'
Updated at 8:02 a.m. ET -- Rick Santorum scored victories in the Mississippi and Alabama primaries on Tuesday, depriving Mitt Romney of a signature win in a conservative stronghold and raising fresh doubts about the viability of Newt Gingrich's campaign. Th …
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Better diagnosis, screening behind rise in autism
Better diagnosis, screening behind rise in autism
Dolphin society adopts freewheeling lifestyle
Scary anti-smoking ad campaign launches
Santorum wins Mississippi and Alabama primaries, Romney takes Hawaii
Arctic snowy owls soar south in rare mass move
Survey: Facebook-related divorces on the rise
Police charge mother in death of Missouri tot
Victims speak out about North Carolina sterilization program, which targeted women, young girls and blacks
Court hearing in Amsterdam on fate of killer whale