#438 Why are katana blades curved?
Why are katana blades curved? They are curved to make them more efficient at cutting. Katana are long, curved swords from Japan. […]
#437 How does a caterpillar become a butterfly?
How does a caterpillar become a butterfly? By dissolving itself and regrowing. Caterpillars start life as an egg. Female butterflies lay eggs […]
#436 Who made the first English dictionary?
Who made the first English dictionary? Robert Cawdrey in 1604. There was no need for a dictionary throughout most of the history […]
#435 What makes rain smell?
What makes rain smell? A combination of plant oils, bacterial spores, and ozone. Everything always smells very fresh after a rainfall and […]
#434 Why do we have a coccyx?
Why do we have a coccyx? The coccyx is a series of three, four or five vertebrae at the base of the […]
#433 Does the Oort cloud exist?
Does the Oort cloud exist? Possibly, but there is no way of knowing. It is still just a working theory. The Oort […]
#432 How does dry cleaning work?
How does dry cleaning work? Clothes are soaked in a water-free liquid solvent. Dry cleaning is a way of washing clothes without […]
#431 Why do the leaves on a tree change color in the autumn (fall)?
Why do the leaves on a tree change color in the autumn (fall)? The leaves on trees change color in the autumn […]
#430 Why does smoke inhalation kill people?
Why does smoke inhalation kill people? It reduces the amount of oxygen that the lungs can take out of the air and […]
#429 Why do our stomachs grumble?
Why do our stomachs grumble? Because the muscles in the stomach and small intestines are contracting and there is no food in […]