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.
A familiar picture â yet this is not the Titanic going down, but her lookalike, rival trans-Atlantic liner, Cunardâs RMS Lusitania, which sank off the Irish coast with the loss of 1,198 lives on 7 May 1915, three years after the Titanic went down.