According to the researchers, the age of the oldest female white shark sampled was 40, and that of the oldest male was 73. Reuters

Google Inc (NASDAQ:GOOGL) has been forced to reinforce its undersea internet cables because sharks keep biting them.

Their fiber-optic cable network, that spans more than 100,000 miles around the world is being reinforced with protective matting made out of a Kevlar-based material.

Sharks were first noticed being attracted to the undersea sea cables in the mid-1980s but the reason for this behavior is not known yet.

It is suggested that the sharks are attracted to the electromagnetic signals given off by the undersea cables which resembles a field created by fish.

Here is a clip of an underwater camera catching a large shark biting at a fiber optic cable in 2010.