NASA launches its most ambitious hunt for traces of life on Mars, landing a car-sized rover in a rocky, ancient river delta. The rover will stow samples for possible return to Earth and test technology that may pave the way for human travel to Mars.
Explore great ancient Maya cities and why their inhabitants abandoned them.
Intrepid paleontologists discover that dinosaurs thrived in the Arctic’s cold and dark.
Explore how the scientific secrets of butterflies are inspiring technological innovations.
