Can new emission-free electric planes replace our polluting airliners and revolutionize personal transportation in our cities? NOVA takes a ride in some quiet, energy-efficient, prototypes that are vying for success as electric flight takes off.
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.
