September 11, 2001 was one of the darkest days in modern American history. In a series of coordinated terrorist attacks, carried out by al-Qaeda, hijacked commercial planes were turned into deadly ...

In a new study published in Science, researchers analyzed the impacts of free-roaming bison in Yellowstone National Park.

In 1798, a British sea captain spotted a speck of land while sailing in the South Pacific Ocean. He dubbed it “Pleasant Island.” But today, the island is known as Nauru. It’s the third-smallest ...