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.
There are more than 350 different kinds of sharks, such as the great white and whale sharks. Fossils show that sharks have been around for 420 million years, since the early Silurian. Most sharks are predators, meaning they hunt and eat fish, marine mammals, and other sea creatures. However, the largest shark eats krill, like whales. This is the whale shark, the largest fish in the world.