Here’s one of my favourite webpages on the internet. When im feeling confused by life i just click on the link and it always makes me feel better – puts things in perspective. The page looks at a huge variety of objects in the universe and compares them all in terms of length. The list is an amazing mix. The length of a London bus (the old Routemaster), next to the Large Megallanic Cloud, next to the width of a quark, next to a golf ball makes me laugh. The universe is so mad. O yeah the size of a human being is in there too. My favourite though is Quantum Foam. What’s that i hear you ask?……..

Quantum foam, also referred to as spacetime foam, is a concept in quantum mechanics, devised by John Wheeler in 1955. The foam is supposed to be the foundations of the fabric of the universe[1].

http://en.wikipedia.org/wiki/Orders_of_magnitude_(length)