World War I Allies plant 600 tons of explosives in secret tunnels under the German trenches.
Rocks were essential to advancing life on Earth billions of years ago.
Scientists explore Antarctica's under-ice landscape in search of the mystery killer destroying the polar food web.
The science and anatomy of the April 2015 earthquake in Nepal, as well as stories from survivors who were on Mount Everest and from residents who live near the epicenter.
Deep-sea scientists study the undersea world of creatures that flash, sparkle, shimmer or glow.
Researchers study how memories can be implanted, changed and erased.
New discoveries about Otzi the iceman, the oldest human mummy on Earth, reveal details about the dawn of civilization in Europe.
Advanced humanoid robots adapt to human needs, battle real-world challenges and become part of everyday life.
Dr. Sarah Parcak uncovers new details about the expeditions and settlements of the Vikings.
Studies of the brain have produced new insights that could lead to a better understanding of dementia and other memory-impairment disorders.
Newly established wildlife corridors offer hope to endangered species around the world.
Engineers work to save historic Gay Head Lighthouse on Martha's Vineyard, which is falling victim to the ocean's erosion of the island's cliffs.
Historians and engineers investigate how Allied forces conspired to destroy Hitler's "supergun."
The psychology of a terrorist and the tools used by governments to thwart their efforts.
Reimagining the future of education to help prepare children to compete in an age of rapid innovation and globalization.
Discoveries about human origins and how humans have survived climate change and geological catastrophe.
Engineers and designers build Crossrail, a new subterranean railway beneath the streets of London.
Precious gems, metals and energy resources are forged under the earth.
The unique properties of metals and how they've helped lead human civilization from the Stone Age to a hi-tech world.
Earth's natural resources provide energy to power the modern world.