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Know what you want - puzzling puzzle
Who makes it, doesn't tell it.
Who gets it, doesn't know it.
Who knows what it is, doesn't want it.
What is it?
Who gets it, doesn't know it.
Who knows what it is, doesn't want it.
What is it?
Einstein as a speed devil - science puzzle
| How fast should you drive towards a red traffic light to see it appear as green? |
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Rocket launch - science puzzle
| Why are the European Ariane rockets launched from the Korou site in French-Guyana, South-America, and not simply from some place in Europe where the rockets are partly built? |
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