If the observations of cosmic acceleration featured in the NOVA program "Runaway Universe" are correct, then the universe will probably continue to expand forever. Does this mean that the universe ...

For most of us, the Pyramids symbolize the distant past. After all, they're more than 4,500 years old. But for geologists and paleontologists, they might as well have been built yesterday.

When the last of the volcanic ash from Mount Vesuvius settled over Pompeii in A.D. 79, it preserved a detailed portrait of life in the grand Roman city, from bristling military outposts to ...