The Renaissancepolymath Leonardo da Vinci died 500 years ago today, on May 2nd, 1519. He was a painter, sculptor, draughtsman, architect, designer, engineer, inventor, writer, astronomer, musician, mathematician, cartographer, geologist, anatomist, botanist and scientist.
You can read about him at Grove Art Online. The article includes some images and links to many more.
Rather than just presenting you with information, Mathigon challenges you with problems and allows you to interact with diagrams. It is one of the most accessible and engaging maths resources available on the web, a true mathematical wonderland. The text is well-written, the pages are beautifully designed and presented, and it covers a large array of topics.
which aims to introduce readers to the beauty and the practical applications of mathematics. A lot of people don’t have a very clear idea what “real” maths consists of, and often they don’t realise how many things they take for granted only work because of a generous helping of it. Apparently, some people even have the idea that it’s boring! Weird.
Plus has articles, videos, puzzles and other maths-related content.