There is now a new article called How Time Works that answers all of these questions about clocks and calendars, plus many more! You will be amazed, because we take all of this stuff completely for granted and the origins are amazing!
In 1977, SETI volunteer Jerry Ehman found a transmission printout so exciting he circled the paper with the word "Wow!" It seemed to indicate a message from outer space. But was it really?
To anyone familiar with the solar panels of the past, the possibility that a tarp could turn solar energy into electricity is pretty amazing. Could your next high-tech tent provide shelter and energy?