What was the name of the scientist who first declared that the earth revolves around the sun?

The Siegfried Line, known in German as the Westwall, was a German defensive line built during the 1930s opposite the French Maginot Line. The name derived either from a German defensive position of World War I, the Siegfriedstellung. The Siegfried Line stretched more than 630 km (390 mi) and featured more than 18,000 bunkers, tunnels, and tank traps.

Dal is a lake in Srinagar the summer capital of Jammu and Kashmir. The urban lake is integral to tourism and recreation in Kashmir and is named the “Lake of Flowers”, “Jewel in the crown of Kashmir” or “Srinagar’s Jewel”.