Mayan Mathematics - The Mayans had one of the most advanced number systems in the world at its time. It was a base-20 system (kind of) that also relied quite heavily on the number five. Some think that this is due to five fingers and five toes on each hand and foot. Their system relied on three different symbols. A “pebble” (small black circle) was used to represent the ones place. Learn more: https://3010tangents.wordpress.com/2015/02/25/mayan-mathematics/
Riding the Harry Potter Train in Scotland Is Just as Epic as It Sounds
The Oldest Scottish Book Remaining in Scotland (Circa 1025) is an eleventh century illuminated version of the Psalms of King David preserved in the Center for Research Collections at Edinburgh University Library. The Celtic Psalter has Celtish and Pictish illuminations. The origin of the psalter is a mystery but experts believe it was probably produced by monks in Iona, who were also associated with the making of the Book of Kells.