©2015 Bloomberg News NS83JR6KLVR6 (Bloomberg) — Twitter Inc. executives had a clear message for investors on Tuesday: We have a lot of work to do, and don’t expect great progress anytime soon. After reporting quarterly sales that topped estimates, interim Chief Executive Officer Jack Dorsey and Chief Financial Officer Anthony

For years scientists have been both inspired and puzzled by Stonehenge, the famous British prehistoric monument. Stonehenge is located in Wiltshire, England, 2 miles (3 km) west of Amesbury and 8 miles (13 km) north of Salisbury. It is essentially a huge ring of standing stones which set within earthworks in the middle of