Archaeologists have discovered a vast cemetery of Bronze Age burial mounds, thought to be up to 4,400 years old, ahead of a building development less than 10 miles (16 kilometers) from Stonehenge.The cemetery includes more than 20 circular mounds, known as barrows, built between 2400 B.C. and 1500 B.C. on a chalk hillside near Harnham on the outskirts of Salisbury in southwest England.Other than the site's proximity to Stonehenge, there's no evidence that the cemetery was connected with the famous monument. But the barrows were built around the same time as some of the central stages of Stonehenge, according to...