What size is Stonehenge?

What is the circumference of Stonehenge and how big are stones? We can easily measure them today but how did the Stone Age Britons do it?

Archaeologists think they may have found the key. With a little bit of mathematics they discovered a neolithic unit of measurement - the long foot. There is new evidence backing the long foot in the form of a system of ancient chalk drums.

Image Sources:

Folkton Drums - Trustees of the British Museum

Lavant Drum - Mining and materiality: Neolithic chalk artefacts and their depositional contexts in southern Britain

Maps - Google

[stemcell]

This video is a re-upload, in the last version Srandan Battacharya asked if I could continue my series on group theory. First, I'm going to plan out how I want the course to look, and then I will be able to publish the videos in quick succession!

[martasanchezpavon]

I want to start a math channel too and your videos are a great inspiration for me. Please keep the good work and uploading interesting mathematical stuff!

[ijcmartinez]

I haven't (yet) taken a look at the paper, but just looking at the pictures of the drums, it looks like it has grooves were one can begin threading string or rope as in getting a spool of twine started. Even the way they cross over each other in a way that seems to naturally happen when one reeling in a kite or a fishing line.

[johnnicholson]

The museum next to SH should display this video.

[laxmikantbarik]

CAN U PREDICT WHY SPEED OF LIGHT IS EQUAL TO THE COORDINATES OF PYRAMID OR JUST COINCIDENCE