On a remote hillside in modern-day Turkey sits Göbekli Tepe, the oldest temple on Earth. For centuries, archaeologists believed it was a religious center built by nomadic hunter-gatherers before the ...

Leonardo da Vinci was a Renaissance genius. Not only did he paint masterpieces of art, but he was an obsessive scientist and inventor, dreaming up complex machines centuries ahead of his time, ...

New evidence suggests that the larger system the Gulf Stream is part of is approaching a tipping point that could cause dramatic shifts in global weather patterns. ByKara Norton Thursday, February 17, ...

Snake robots might come in handy for surgery, search-and-rescue missions, and even space exploration—but they’re nothing without the slithering serpents that inspire their design. ByKatherine J. Wu ...

Both Hour 1 and Hour 2 of this two-part program are divided into chapters. Choose any chapter below and select QuickTime or Windows Media Player to begin viewing the video. If you experience ...

Forecasters and researchers following a developing hurricane can accurately measure and rate its strength soon after it begins by collecting data from storm-hunting airplanes, radars, and satellites.

Carl Sagan, the astronomer, Pulitzer Prize-winning author, and legendary popularizer of science, gave this interview during the making of "Time Travel." True to form, he discusses arcane aspects of ...

Dogs have long been dependable companions by our sides. But it wasn’t always that way, and a look at their closest living relative, the wolf, makes it clear why. Research into dog domestication and ...

Before the restoration team could begin, they had to take apart, block by block, and repair nearly every piece of the Parthenon. That's because early restorers, most notoriously a Greek engineer named ...

1. Katrina makes landfall in Louisiana at 6:10 a.m., but the flooding of residential areas in greater New Orleans actually begins an hour and a half earlier. Between 4:30 and 5 a.m., levees located ...

Arch bridges are one of the oldest types of bridges and have great natural strength. Instead of pushing straight down, the weight of an arch bridge is carried outward along the curve of the arch to ...

Jupiter's massive gravitational force has made it both a wrecking ball and a protector of Earth.