Matt Parker is an Australian mathematician, author, comedian, and YouTuber.
His YouTube channel, Stand Up Maths, (found here
) has over 800 thousand subscribers and is focused on interesting concepts in the maths world. He is also a contributor to the Numberphile channel. In addition, he has written two books, Things To Make And Do In The Fourth Dimension and Humble Pi. The former book is an exploration of maths concepts from the simple to the complicated with hands-on activities along the way, while the latter tells of cases where incorrect maths contributed to expensive or embarrassing incidents and disasters.
