It's tough to comprehend all that the queen has experienced since she was born on April 21,1926 - from the second World War to the invention of the Internet, the first African-American US president to the first female UK prime minister, or space exploration to the birth of the digital age. To commemorate her majesty's 90th birthday,we're taking a peek at some of the key moments from each of her nine decades, both publicly and privately.
Source: popsugar.com