Celebrate the Queen's 90th Birthday With Some of Her Most Memorable Moments by Decades

It's hard to comprehend all that the Queen has experienced since she was born on April 21, 1926 — from World War II to the invention of the internet, the first female UK Prime Minister to the first African-American US president, not to mention space exploration to the birth of the digital age. To commemorate Her Majesty's 90th birthday, we're taking a look at some of the key moments from each of her nine decades, both publicly and privately.