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.
At the time of its construction, the Brooklyn Bridge was the longest suspension bridge in the world with a span of from pier to pier 1595.5 feet. The towers are 270 feet high and the roadway is 135 feet above mean tide-water, which allows boats of less than 1,000 tons to navigate beneath it.