What Is an Icebreaker?
Icebreaker is a ship which is specially shaped and strengthened so that it can cut through ice-fields which would stop or crush an ordinary
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What Is a Baker’s Dozen?
A baker’s dozen is 13 (or, more rarely, 14), instead of 12. A baker’s dozen takes on importance in large families, where that little extr
How Many Bones Do Sharks Have?
The answer is zero. Did you know they have a skeleton made entirely of cartilage rather than bone as in other fishes. A shark’s…
Why Is It Harder to Walk Uphill than Downhill?
It is harder to walk uphill than downhill because you must lift the weight of your body and to do this requires greater energy than that nee
How Do Automatic Doors Work?
Doors — known as automatic doors — open and close with the help of simple technology, they operate with the help of sensors. Sensors do