Most cases of black stools are from eating black foods or iron supplements. The most common condition causing black stools is a bleeding ulcer. Black stools caused by blood indicate a problem in the upper digestive tract. Blood in the stool can be detected through a stool test.
Akashi-Kaikyo Bridge, Japan. The Akashi-Kaikyo Bridge, spanning the Akashi Strait, connects the city of Kobe and Awaji Island in Hyogo Prefecture. It is the world's longest suspension bridge, with its central span measuring 1,991m. Its made up of six lanes with a combined length of 3,911m.
A+E Networks. On this day in 1933, construction starts on what will become one of Americaâs most famous landmarks: the Golden Gate Bridge. When completed in 1937, the Golden Gate has a 4,200-foot-long suspension span, making it the worldâs longest suspension bridge. Since opening to the public in May 1937, almost 2 billion vehicles have crossed the bridge, in both the north-and southbound directions.