The Sumerians are thought to have formed the first human civilization in world history. They lived in southern Mesopotamia, between the Tigris and Euphrates Rivers in the Middle East. Cradle of Civilization. Many historians think that cities and towns were first formed in Sumer around 5000 BC.
At noon, on March 21 and September 23rd are the vernal and autumnal equinoxes. The sun is directly overhead at the equator at these times. On June 22nd is the summer solstice, in the Northern Hemisphere. The sun is at the 23.5 degrees Northern latitude.
This Saturday is the June solstice, marking the longest day of the year and the astronomical start to summer in Earthâs northern hemisphere. At 6:51 a.m. EDT on June 21, the sun can be seen directly overhead along the Tropic of Cancer at 23.5Âº north latitude. With the Earthâs North Pole at its maximum tilt toward the sun, locations north of the equator see the sun follow its longest and highest path across the southern sky.