#458 What causes pins and needles?
What causes pins and needles? Pins and needles are caused because the flow of blood to your nerves is restored. Pins and […]
#457 Is an Olympic gold medal really made of gold?
Is an Olympic gold medal really made of gold? The gold medal the winners at the Olympics get is only 7.5% gold. […]
#456 When did people start using glass for windows?
When did people start using glass for windows? The Romans were the first people to have glass in their windows, but it […]
#455 Why do we have goosebumps?
Why do we get goosebumps? Goosebumps are a reaction left over from when humans used to have a thick coat of fur. […]
#454 Why do we still have wisdom teeth if we don’t need them?
Why do we still have wisdom teeth if we don’t need them? Because they appear after birth, which means it is very […]
#453 When were sunglasses invented?
When were sunglasses invented? The first sunglasses were used by the Inuit people tens of thousands of years ago. The Inuit people […]
#452 What is the densest material in the universe?
What is the densest material in the universe? Osmium is the densest material on Earth, but the densest material in the universe […]
#451 What were the moa and what happened to them?
What were the moa and what happened to them? The South Island Giant Moa was a 3.6 m tall bird that were […]
#450 Why is oil measured in barrels?
Why is oil measured in barrels? Oil is measured in barrels because that was the size of a wine barrel in 1866. […]
#449 What are contact lenses made of?
What are contact lenses made of? Soft contact lenses are made of an oxygen permeable soft plastic. Hard lenses are made of […]