While we move soap around, it lifts up invisible oil that holds germs onto your hand.
Although people can reduce their chance of getting cancer by making healthy lifestyle choices, unfortunately it is not possible to completely prevent it... and scientists are still not entirely sure why.
Find out the role of acceleration and air resistance in answering this child's question.
Scientists have been researching the source of water on earth for a long time - and believe it came from a combination of two places.
