hehe, timetravellllllllllll...that's a complex subject...i advise you base the story on fiction, cos if you base it on facts you'll spend all your life explaining it...
if i were you i'd loosely base it on "Black Adder: Back and Forth"...that's the sort of thing a teacher would enjoy in an essay...
if i have the time i'd know everything about timetravel...but ofcource, as usual, school gets in the way of my education...that's irony...
http://www.howstuffworks.com/time-travel.htm
[ October 06, 2001: Message edited by: Gluk Schmuck ]