The time it takes for a shark use and lose each tooth varies, depending on the species and age. Younger sharks replace their teeth more often. There is also some evidence that sharksâ teeth last significantly longer during colder water temperature in some sharks, a time when they traditionally eat less.
Last Titanic survivor, a baby put in a lifeboat, dies at 97. Millvina Dean taken ill with pneumonia in England, after Hollywood stars DiCaprio and Winslet came to her aid. Millvina Dean, the last living survivor of the Titanic disaster, with a painting of the vessel. Photograph: John Stillwell/AP.
When the RMS Titanic sank 100 years ago, about 1,500 passengers and crew went down with it. Some 340 of these victims were found floating in their life jackets in the days following the shipwreck. But what happened to the other 1,160 is still a mystery. Newly released photos suggest that at least some of the unlucky travelers' remains are mixed in with the wreckage of the ship.