- If you accidentally eat a razor blade, don't worry; the human stomach is highly acidic and can break down the blade within two hours. But you'll definitely end up with a mouth injury.
2. Eating bananas can kill you because they contain radioactive potassium. But don't worry, a person would need 10 million bananas to die from radiation.
3. Some marine animals, such as turtles and salmon, can detect the Earth's magnetic field by orienting themselves. This is why they always find their way home, unless they are caught by fishermen.
4. Many people think that our main source of oxygen is forests, in fact it is the oceans that contribute at least half of the total amount of oxygen on the face of the earth.