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Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

More than two thousand years ago, the thriving city of Petra rose up in the bone-dry desert of what is now Jordan.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Istanbul's magnificent Hagia Sophia has survived on one of the world's most active seismic faults, which has inflicted a dozen devastating earthquakes since Hagia Sophia was built in 537 AD.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza -- and how they did it.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the unlikeliest of places -- the cold and dark of the Arctic Circle.

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time.

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time.

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time.

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time.

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time.

Scientists investigate colossal explosions in Siberia and other evidence that rapidly melting soil in the Arctic is releasing vast amounts of methane, a potent greenhouse gas.

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time.

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time.

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time.

Over the past few decades, the number of skyscrapers worldwide has climbed dramatically.

Soaring skyscrapers are potent symbols of prestige, and architects are vying to build them ever higher.

Over the past few decades, the number of skyscrapers worldwide has climbed dramatically.

Soaring skyscrapers are potent symbols of prestige, and architects are vying to build them ever higher.

Soaring skyscrapers are potent symbols of prestige, and architects are vying to build them ever higher.

Soaring skyscrapers are potent symbols of prestige, and architects are vying to build them ever higher.

Soaring skyscrapers are potent symbols of prestige, and architects are vying to build them ever higher.

Soaring skyscrapers are potent symbols of prestige, and architects are vying to build them ever higher.

Explore the dramatic story of NASA's James Webb Space Telescope-the most ambitious observatory ever launched-through a series of high-stakes milestones, from its conception to completion.

Explore the dramatic story of NASA's James Webb Space Telescope-the most ambitious observatory ever launched-through a series of high-stakes milestones, from its conception to completion.

Explore the dramatic story of NASA's James Webb Space Telescope-the most ambitious observatory ever launched-through a series of high-stakes milestones, from its conception to completion.

Explore the dramatic story of NASA's James Webb Space Telescope-the most ambitious observatory ever launched-through a series of high-stakes milestones, from its conception to completion.

Explore the dramatic story of NASA's James Webb Space Telescope-the most ambitious observatory ever launched-through a series of high-stakes milestones, from its conception to completion.

In July 2022, NASA's James Webb Space Telescope released its first images, looking further back in time than ever before to show our universe in stunningly beautiful detail.