2010-03-06, 07:42 PM
http://en.wikipedia.org/wiki/Gravity_train
http://www.bbc.co.uk/dna/h2g2/A2960633
You just have to dig a really long tunnel, drop something in it and let momentum do the rest.
http://www.bbc.co.uk/dna/h2g2/A2960633
You just have to dig a really long tunnel, drop something in it and let momentum do the rest.

