Quote (GRATS @ Sun, 13 Sep 2009, 14:40)
Sharks can smell one drop of blood in a million drops of water.
Scientists can determine the age of a shark by counting the rings that form on its vertebra, much as you can count the rings on a tree to tell its age.
this was proven incorrect in some show i watched in shark week, discovery channel cuh, you know thats legit.
if i remember correctly only 2 species react to human blood in water. and then its just a mild curiosity.
its 1:10000 for fish blood with only a handful of the species again able to recognise blood alone.