While AIDS came to prominence in the 1980s, a new study published Friday says it was actually around decades before, in the 1920s.
In what an international team of scientists are calling a "perfect storm" for spreading the virus, they think its proliferation started in the city of Kinshasa, the cap...

Kevin Alloca discusses the four main resons why videos go viral.TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes. Featured speakers have included Al Gore on climate ch...