With the size of its economy and its high-tech military, the United States is generally considered the most powerful nation on Earth. But how long can it remain that way? Trace explains the limitations that curb U.S. power.
Dogs might only have a 10,000-year history in the Americas, suggests a new study that also concludes many early American dogs were wolf-like and highly valued.
The United States and Cuba made a historic breakthrough in their Cold War stand-off Wednesday, moving to revive diplomatic ties and launch measures to ease a five-decade US trade embargo.
Scary, mysterious clowns have been spotted stalking two California towns. And it's not the first time. Continue reading →
A 22,000-year-old mastodon skull and tool dredged from the seafloor in the Chesapeake Bay hints of early settlers in North America.
There are half a dozen U.S. flags on the moon, honoring the amazing achievements of the Apollo missions. It took a surprising amount of engineering thought to plant those old glories. What would they look like today, after 45 years up there alone?
Visitors don't even have to get out of their cars to enjoy some of America's natural beauty.
Mysterious cattle mutilations on a Missouri ranch have spawned many wild theories, but science may have the answer. Continue reading →
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