Interesting how the pyramids have been around for 4500 years and we still don't know all about their structure...
Fun fact: there's a Neolithic site in Ireland, Newgrange, that's actually older than the pyramids. Fascinating and worth a visit: https://en.wikipedia.org/wiki/Newgrange
Fun fact: there's a Neolithic site in Ireland, Newgrange, that's actually older than the pyramids. Fascinating and worth a visit: https://en.wikipedia.org/wiki/Newgrange