We all know Leonardo Da Vinci's life and work -- but until now, we have not known what he looked like as a man. Illustrator and activist Siegfried Woldhek used some thoughtful image-analysis techniques to find what he believes is the true face of Leonardo. Announcing his discovery for the first time at last month's TED conference, he walks us through exactly how he did it.
The work of illustrator Siegfried Woldhek is a familiar sight in the European press. His witty pen and sharp eye for faces helps him capture political and literary figures in his home country, the Netherlands, and around the world (he estimates he's drawn 1,100 faces). He's also an accomplished illustrator of nature, and was the longtime CEO of the Dutch branch of the World Wildlife Fund.
Woldhek is the founder of nabuur.com, "the global neighbor network." On nabuur.com, villages in developing communities can connect with volunteers and resources online throughout the world -- sort of a Match.com that pairs communities with the people who'd like to get involved.
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