Science

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

Robert Kirshner, an astrophysicist from the Harvard-Smithsonian Center for Astrophysics, answers the question, "What is a supernova?" A supernova explosion is something where you see a star that you hadn't seen before suddenly turn billions of times brighter…

While the title of Senior Adviser for Innovation at the State Department may sound vague, the problems Alec Ross and his colleagues tackle are very real; from poverty to pandemics, from disaster to diplomacy.