#408 How thick are Saturn’s rings?
How thick are Saturn’s rings? The rings of Saturn are incredibly thin. They are only about 10 meters thick. Saturn is a […]
#407 How do scales work?
How do scales work? There are four different types of scales and they work in different ways. They are balances, steelyard balances, […]
#406 Who invented the skateboard?
Who invented the skateboard? The skateboard was invented so that surfers could keep surfing when the sea was flat and there were […]
#405 Do ants need to sleep?
Do ants need to sleep? Ants do actually sleep, but not all at once. There are very few living organisms that don’t […]
#404 How does the heating element in a toaster work?
How does the heating element in a toaster work? It is made of a metal that has a high electrical resistance so […]
#403 When was corrugated cardboard first used?
When was corrugated cardboard first used? Corrugated cardboard was first used as a liner for top hats. Corrugated cardboard is commonly used […]
#402 What is the tallest a mountain can be?
What is the tallest a mountain can be? It depends on the strength of the surface gravity, the amount of volcanic activity, […]
#401 What exactly is cubism?
By Pablo Picasso – wordpress, PD-US, https://en.wikipedia.org/w/index.php?curid=38782663 What is cubism? Cubism is an art form where the artist tries to show an […]
#400 Why do we get a headache when we are dehydrated?
Why do we get a headache when we are dehydrated? You get a headache when you are dehydrated because your brain shrinks […]
#399 When did people first start using locks and keys?
When did people first start using locks and keys? Keys and locks were first used about 6,000 years ago. The earliest lock […]