Take a paradigm-changing researcher from the 19th century, a 21st century communications medium, and the timeless impulse of humans to celebrate the annivesary of a friend's birth, and what do you have?

Several dozen scientists, from all over the world, using YouTube to sing happy birthday to Charles Darwin, who would've turned 200 today. Past AAAS Presidents Peter H. Raven and Francisco J. Ayala were among those to join the greeting--Ayala with a dignified "¡Feliz cumpleaños!"

AAAS CEO Alan I. Leshner, who serves also as executive publisher of Science, delivered this greeting: "We're delighted you were born--you've certainly evolved our view of life and how it came about."

The YouTube birthday card for Darwin was produced by the Society for the Study of Evolution. Check it out.