deletions | additions       diff --git a/subsectionAims__To_u.tex b/subsectionAims__To_u.tex  index 8fe42c4..d876f60 100644  --- a/subsectionAims__To_u.tex  +++ b/subsectionAims__To_u.tex 
...
fluctuations in matter density in the early universe that have grown into the   galaxies and clusters we see today.  The discovery in the 1990s that the Universe's expansion is accelerating fundamentally  changed our understanding not just of how the Universe will evolve but also raised questions  about  its composition. Large galaxy surveys such as the 2dF Galaxy Redshift Survey and Survey, performed at  the Sloan Digital Sky Survey   have Anglo-Australian telescope in New South Wales,  mapped the positions in the sky of millions extremely large numbers  ofgalaxies in the  nearby Universe, galaxies,  and show that rich, complex structure exists on even the largest scales. Our inability to replicate the Universe within the confines of a laboratory makes  doing accurate Cosmology inherently difficult, and it is hoped that this  practical exercise will give you an appreciation for the power and limitations of