OK. over this few months of taking MRT to school, I asked myself this question.

" why do railway track have rocks?" - I believe everyone ask themself that before but was too lazy to find out. !!! SO !! i found this site and i get to know more about it.. It's intresting =)

http://en.wikipedia.org/wiki/Track_ballast

And the rocks are not call rocks but ballast. INtresting hur~
Ok. THis is a random post =) enjoy and good nights babiess! =_