At a temple site, the remains of an ancient Egyptian astronomical observatory ... and invented the 365-day calendar. Their solar calendar corresponded with the dates of special rites, such as ...

Ancient Egyptian: What have you got in this linen sack thing anyway? Oh, a calendar! Now that is useful. It’s similar to our own solar calendar which has 365 days in it. You do have bread at least!

When we think of modern innovations, we often picture digital devices, advanced medicine, or sleek engineering. But what if many of the ideas we call “modern” were already in use thousands of years ...