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 vessel. Although the term...
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What Is a Baker’s Dozen?
A baker’s dozen is a group or set of 13 (or, more rarely, 14), instead of 12. It takes on importance in large families, where that little extra goes a long way....
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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 skeleton is made of cartilage and...
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Why Is It Harder to Walk Uphill than Downhill?
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...
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How Do Automatic Doors Work?
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...
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