Google welcomes summer solstice with new Doodle
Google's homepage features an animated sequence of a cartoon character with an acorn-shaped head
Google Doodle honours Pap smear inventor Georgios Papanikolaou
Georgios Papanikolaou would have been 136 years old Monday
Google Doodle celebrates 30th anniversary of the World Wide Web
March 12, 1989 was a big day