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How long did it take Galileo to make the first telescope?
forever
8 days
Usually not long, mostly you just have to get their attention first. (:
It took the first computer 1 hour and 36 minutes to make computations.
4 years
about half a year
how long does it take to make a crayons
how long did it take Levi Huthins to make the first alarm clock
Yes, as long as it isn't a dare. Make the other guy do it first.
It took about 48 hours, from start to finish product
2 1/2 years