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. Leonardo di ser Piero da Vinci was an Italian Renaissance polymath: painter, sculptor, architect, musician, scientist, mathematician, engineer, inventor, anatomist, geologist, cartographer, botanist, and writer. His genius, perhaps more than that of any other figure, epitomized the Renaissance humanist ideal. Leonardo has often been described as the archetype of the Renaissance Man, a man of "unquenchable curiosity" and "feverishly inventive imagination". He is widely considered to be one of the greatest painters of all time and perhaps the most diversely talented person ever to have lived.