#18 Why isn’t Pluto a planet?
I learned this today. Pluto has been classified as a dwarf planet instead of a planet because it only meets two out […]
#17 What happens when animals hibernate? Is it the same as sleeping?
I learned this today. Hibernation is not the same as sleeping. Animals sometimes have to come out of hibernation to be able […]
#16 Where do the plus, minus, multiplication, and division symbols come from?
I learned this today. The mathematical symbols + plus, – minus, x multiply, ÷ divide, and = equal are not as old […]
#15 How is food canned?
I learned this today. Canning preserves food by killing all of the bacteria present through heat and then keeping the food in […]
#14 How is leather made? Why is it so strong?
I learned this today. Leather is strong because the collagen fibers in the animal skin are strengthened and bolstered by other chemicals. […]
#13 How does a gun silencer work?
I learned this today. A gun silencer works by reducing the speed of the gases that push the bullet out of the […]
#12 How does alcohol make us drunk?
I learned this today. Alcohol gets people drunk because it is a depressant and slows down the speed at which the brain […]
#11 How did the elevator change our lives?
I learned this today. Before the invention of the elevator (lift for my British friends), wealthy people lived on the lower floors […]
#10 What causes seasickness?
I learned this today. Seasickness is caused because of a discrepancy between the vestibular system and the eyes. Just inside your head, […]
#9 How can an airbag inflate so quickly?
I learned this today. An airbag can inflate so quickly because it contains sodium azide, which produces nitrogen gas when it ignites. […]