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.
Quick Answer. Japan's Akashi Kaikyo Bridge stretches 12,831 feet and can withstand 179-mile-per-hour winds, and it is considered to be the strongest bridge in the world. According to CNN, suspension bridges rank among the lightest yet strongest bridges in the world.