Space, the Final Frontier.
Although not for Apple.
To celebrate the 15th Birthday of the legendary Apple iPod, we've set about solving that age-old conundrum pondered by academics and mathematicians the world over - if you were to horizontally stack every iPhone, iPad and iPod on top of one another, how high would they reach? Through the beauty of calculators, we've got the answers. Take a look below at the image which helps put into perspective the quite remarkable sales figures that Apple has achieved since the turn of the millennium.