Many videos on the internet go viral, and some are so terrifying that they make you sit on the edge of your seat. Among these are chilling wildlife encounters that leave viewers stunned.

(We usually celebrate collagen production in simple wound repair ... acid to improve cellular turnover at the site of the scar, while tiger grass soothes skin and vitamin C helps prevent ...

(AP Photo/Charlie Riedel, file) A look at the injuries for Tiger Woods, who had surgery Tuesday on a ruptured left Achilles ...