You may have heard rumours that deodorants and antiperspirants could cause breast cancer. But these concerns were started by an e-mail hoax. There is no convincing evidence that antiperspirants and deodorants cause breast cancer. Why are the claims about deodorants and breast cancer wrong? The original e-mail claimed that antiperspirants stop your body from sweating out poisons. It suggested that these toxins build up in the lymph glands under the arm and cause breast cancer.
Sharks Have Been Around For Longer Than Trees. The earliest sharks swam through Earth's oceans around 420 to 450 million years ago, a time when there were no true trees on land. Paleontologists can trace the history of sharks this far back by examining fossilized shark teeth and scales.
Some scientists believe that the life expectancy of the Great White Sharks is around 30 years (Levine, 1988) but other research indicates that they can reach up to 40 years. The lifespan of Tiger Sharks in the wild is believed to be 27 years in average, although some may live up to 50 years of age.Like with other species, tiger sharks in captivity do not live as lengthy as in wildlife reaching only 17 to 20 years.n the wild, it is thought that their life expectancy is 30 years. The typical lifespan in the wild for Hammerhead Sharks is from 20 to 30 years approximately. Sandbar sharks or Brown sharks are considered to live between 20 and 30 years. Research made by Joung (2004) identified to be about 20 years of age.