The logo for the day represents an animated chemistry set complete with flasks, beakers, cooling towers, and even a coffee pot to spell out the company’s logo all bubbling away regardless of what you do with your mouse on the page.
Born 31 March 1811, Robert Bunsen was a German chemist that investigated emission spectra of heated elements, and discovered caesium (in 1860) and rubidium (in 1861) with Gustav Kirchhoff.
Bunsen developed several gas-analytical methods, was a pioneer in photochemistry, and did early work in the field of organoarsenic chemistry.
With his laboratory assistant, Peter Desaga, he developed the Bunsen burner, an improvement on the laboratory burners then in use. The Bunsen–Kirchhoff Award for spectroscopy is named after Bunsen and Kirchhoff.
Little did he know at the time that it would be the highlight of most students time in the science labs.
UPDATE: According to Marissa Mayer, VP, Consumer Products at Google, the faster you move the mouse the more the flame heats up!