I love the way mathematicians can write down mind boggling numbers in such a neat way. For example the distance that takes light ten million years to travel is written as 1023 meters.
Travelling 1023 meters doesn't sound much does it? You would have to travel at the speed of light for ten million years to acheive it.
There is a site called Molecular Expressions that takes you on a journey from deep space to a leaf in the laboratory gardens.