The first mechanical clock was invented during the early Renaissance. Improvements were made by Galileo who invented the pendulum in 1581. This invention allowed clocks to be made that were much more accurate.any of the great scientific discoveries made during the Renaissance were in the area of astronomy. Great scientists such as Copernicus, Galileo, and Kepler all made major contributions. This was such a big subject that we devoted an entire page to it. Learn more about it at our page on Renaissance Astronomy.
Massachusetts does not set a specific age at which a child can be left home alone. In Massachusetts, such issues are decided on a case-by-case basis. For information on abandonment and neglect, see MGL c.119 s.his definition is not dependent upon location (i.e., neglect can occur while the child is in an out-of-home or in-home setting.). Other states have provided some helpful information for parents on the topic, however. See, for example, Florida's When to Leave Your Kids Alone.
Most authorities believe that a 12 or 13 y â¦ ear old can be safely left alone for an hour or two during daylight hours.   Legal Age   There are very few states in the U.S. with legal minimum ages for children home alone, but many state agencies have published guidelines.ypically 8 year olds and over can be left at home for up to several hours (usually after school before a parent gets home from work). 12 years old appears to be the most common recommendation. http://www.latchkey-kids.com/latchkey-kids-age-limits.htm provides a state by state comparison.