Are we sure
Dark Matter is real?
Astronomers
have argued that dark matter can explain the strange motions of galaxies
in clusters and stars in galaxies, but that it cant be normal
stuff
Could
we just have gotten gravity wrong on large scales?
MoND
= Modified Newtonian Dynamics
Viable
alternative, until 2006
Need
to look more into the phenomenon of gravitational lensing on
larger scales