As big as you can take it
forever
4000000 years
doh with the worlds first camera
Usually not long, mostly you just have to get their attention first. (:
probably about a minute or two
4 years
about half a year
It took the first computer 1 hour and 36 minutes to make computations.
It takes me a long time to load cos i am on a slow connection -.-"
how long does it take to make a crayons
Galileo created his first telescope in around two months in 1609. It was a refracting telescope with a convex objective lens and a concave eyepiece. This instrument revolutionized astronomy and allowed Galileo to make groundbreaking astronomical observations.