Behold the one true parabola! All parabolas are exactly the same, just zoomed in and out. Copy of the lecture notes: http://imgur.com/a/OjvYo Original paraboloids video: https://www.youtube.com/watch?v=owVwjr6pTqc Fledgling subreddit: https://www.reddit.com/r/MattParker/ Music by Howard Carter Design by Simon Wright Additional music: Every Voice by Jimmy Fontanez Church Bell Celebration by Doug Maxwell MATT PARKER: Stand-up Mathematician Website: http://standupmaths.com/ Book: http://makeanddo4D.com/ Nerdy maths toys: http://mathsgear.co.uk/