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.
The world's longest pedestrian suspension bridge, the SkyBridge, near Sochi, Russia. At more than 1,400 feet, it claims to be the longest suspension footbridge in the world. Combine that with a height of almost 680 feet off the ground, and visitors are in for one terrifying walk. Oh, and there's a bungee jump in the middle! Russia's recently-opened SkyBridge stretches above the Krasnaya Polyana valley.