According to Google Trends, email is more popular than Elvis, the Beatles, chocolate, beer, Justin Bieber and Harry Potter...
247 billion emails are sent each day. That's one email every 0.00000035 seconds...
If you printed out each non-spam email sent in the world on a single piece of standard A4 copy paper:
* One day's worth of emails would produce a stack of paper 2,159 times taller than Mt. Everest
* It would take just over 20 days for the stack to reach the moon
* Around 4 days later, you could cover the earth's entire surface area