A compound microscope is used for looking at microscopic items. When we look through a microscope we are able to see things we don't usually see. Zacharias Janssen invented the microscope in 1590.
The use of the compass continued to spread. People used it, but they did not know how it worked. Robert Norman discovered the magnetic dip in 1581. He introduced the concept of "attractive force". This is why magnets work.
The Roman Government used to carry public announcements in stone. The Chinese sent out government news bulletins. News Paper quickly relayed information.
Hans Lippershey invented the very first telescope in 1608. His telescope only magnified an object, three times. Galileo learned of the telescope in 1609 and made an improved one.
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