Science

Follow PBS NewsHour’s complete coverage of Science and Technology stories.

EmbedVideo(3431, 480, 320); Science Nation looks for answers in crocodile DNA. Collecting DNA samples isn't easy when your subject could snap off your hand with one bite, but it's a risk David Ray -- a researcher at Mississippi…

May 18

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The Rise of Facebook

Founded in 2005, Facebook's social network has changed our relationships with friends, family and co-workers, created a new playground for politics, and altered the rules for media, culture and advertising. This timeline chronicles the evolution of the social media giant.

EmbedVideo(3389, 482, 304); On Saturday, if all goes as planned, the privately owned spaceflight company SpaceX will launch its Dragon capsule into low-Earth orbit and three days later dock with the International Space Station. It would…