People visited Stonehenge site thousands of years before it was built

Before Stonehenge monuments, hunter-gatherers made use of open habitats

A Major Ocean Current Is at Its Weakest Point in 1,000 Years

Earth’s first set of secondary impact craters discovered in Wyoming. Scientists are now seeking the giant primary impact crater responsible, which would be about 31 to 40 miles (50 to 80 km) wide and buried beneath some 280 million years worth of sediment.