What a perfect way to end the weekend with 'What If?' The hubby has recently been into the website What-If, which comes from the same creator of the XKCD comics. He has been a long time fan of the XKCD comics and has just been interested in Randall Munroe's other site after watching a Ted Talk in answering a reader's questions about Google's data warehouse.
You can see the talk below as Randall Munroe gives an over-detailed answer to the question using tools at his disposal such as math, physics, logic and humor. Take a look and learn something new.