Violence is all over the news. But some say we’re living in the most peaceful time in history. Journey through time and the human mind to investigate whether—and how—violence has declined. And witness how people are working to stop violence today.
Discover the science behind Leonardo da Vinci's masterpieces—and Mona Lisa's iconic smile.
Can new engineering techniques help prevent deadly bridge collapses?
Amazing fossils reveal how mammals took over after an asteroid wiped out the dinosaurs.
