There are many medical reasons that can cause black stools that are tarry with a foul smell, but sometimes dark stools are caused by eating certain foods or taking iron supplements. However, black stools can also be a result of bleeding, and the darker color indicates that the blood could be coming from a point in the upper gastrointestinal tract.
Gertrude Levandowski survived a 96-hour procedure at a Chicago hospital to remove a giant ovarian cyst; the longest surgery. The second longest surgery ever was 40 hours long and that was to remove 6 limbs from a 8 limed baby in India. But the most common longest surgery is spinal cord surgery it is a 14 hour surgery.
According to Guinness World records, the longest kiss was on April 15, 1999, by Karmit Tsubera and Dror Orpaz. They kissed for a record of 30 hours and 45. minutes to win a kissing contest in Rabin Square, Tel Aviv, Israel. A total. of 107 couples took part.