This week we look at a man who looked at the moon whilst it looked at the sun and thought: "Gosh, that looks far away".

But how far away is the sun, really. Or the better question would be: "How far away are we?"

Let's find out as we measure the life and works of Aristarchus of Samos. The second greatest Samos-ian that we have covered so far.

The music was:

"Danse Macabre - Finale" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/

This episode has been a real favourite of mine to record - I sit down with the co-creator of www.euclidea.xyz to ask all of my puzzling questions on how the game was developed, the inspiration behind the puzzles and the role of Euclidean geometry in today's world.

Further reading for some of the referenced papers:

https://arxiv.org/abs/1709.02562

https://www.cut-the-knot.org/triangle/TriangleFromBisectors.shtml

The music was:

"Danse Macabre - Finale" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/

This week: The big cheese. It's Euclid time. Come with me on a journey through his optics, astronomy and or course the elements - a week of exceptionally good maths.

The Music was:

"Danse Macabre - Finale" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/