What diseases were there in the trench in World War 1? Trenche foot was very common in the trench warfare. caused from wet feet and not being able to change their socks and boots. Edit
Repels Sharks No.........human urine actually repells sharks and other fish.
Among the most dangerous to humans are: Great white; Tiger shark; Bull shark; Oceanic White tip; Gray sharks (territorial?) Mako; Only a few species consider people as prey. They usually attack mistaking humans for marine animals on which they feed (mammals or sea turtles). Most of the other sharks attack are provoked (feeding, spearfishing, bleeding, etc.) Sharks donât have many predators.