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.
It was the longest suspension span but not the longest span of all bridges. The Forth Railway Bridge with two spans of 521 m was longer. Bear Mountain Bridge: New York, US: 497 m (1,631 ft) 1924: It was the longest suspension span but not the longest span of all bridges. The Quebec Bridge with a span of 549 m was longer. The first suspension bridge to have a concrete deck.