Malpelo Island

Three of world’s best shark spots are located far off the coast of Central and South American, in the eastern Pacific Ocean. The least known of them, the tiny Colombian island of Malpelo, together with Galapagos and Cocos, create a “golden triangle” for big fish fans.

What are the risks, really?

Experience of life suggests that anything which is fun tends to be either illegal, immoral, fattening or dangerous. Recreational diving partly conforms to this universal law, ranking below hang gliding and parachuting but above most sports in regards to the risk of a fatal accident.

One might suppose that shark teeth are harder than human teeth but they are not.
One might suppose that shark teeth are harder than human teeth but they are not.

Why sharks don't get cavities

To gain a better understanding of how sharks manage to keep their teeth in such pristine condition, a team of German researchers looked at two species that eat in very different ways

The researchers looked at Isurus oxyrinchus and Galeocerdo cuvier (mako and tiger sharks) and found, as they explain in their paper published in the Journal of Structural Biology, after very close examination, that the outer coating of the shark teeth contained one hundred percent fluoride.

HMS Poseidon
HMS Poseidon

China secretly salvaged British submarine

China's claim that the hull of the vessel contained no human remains, identity tags, watches, rings or other personal items has provoked anger among relatives of the men who died

On 9th June 1931 HMS Poseidon was exercising 20 miles north of her home base of Wei Hai Wei when the steamer Yuta was spotted some distance away. Despite excellent visibility, the two vessels collided and the submarine sank within two minutes.