Guess on what evets these Google-doodles where put up:
Birth anniversary of Martin Luther King Jr.
Anniversary of Microsoft Windows
Birth anniversary of Alfred Nobel
Leap Year
50th anniversary of Sputnik
Birth anniversary of Ray Charles
Birth anniversary of Luciano Pavarotti
Discovery of DNA
Birth anniversary of Albert Einstein
Birth anniversary of Florence of Nightingale
Holi
International Womens' Day
50th anniversary of Lego
Birth anniversary of Alfred Hitchcock
Birth anniversary of Arthur Conan Doyle
