Last updated on September 19th, 2019
References:
- http://www.lifebuzz.com/davinci-facts
- http://discovermagazine.com/2006/may/10-da-vinci
- http://www.biography.com/people/leonardo-da-vinci-40396
- http://www.livescience.com/39355-leonardo-da-vinci.html
- https://www.bnl.gov/bera/activities/globe/leonardo_da_vinci.htm