No life on Mars

As much as we really want to find something, I don't think we will find life on Mars.  Look at the Earth as an example, when there is life on a planet it's everywhere.  The soil on the ground is made up of billions of years of organic material as thick as mountains.  Life has spread everywhere and can be seen from space looking down.  If there was life on Mars, after billions of years there should be some obvious sines.  But there are no sines so we try to dig looking for clues.

I suggest we recognize there is no life there and start planning to put life there.  It's not enough to just put people there.  We need to put an ecosystem up there so life can sustain itself.  We should start looking for suitable species and start planning.

Light particle or wave

If light is a particle, why do we see galaxies after extremely long distances.  Particles would diverge as they traveled farther out.  After really long distances the particles would spread out so much that these galaxies would become invisible.  But this does not seem to be the case.  Light must be a wave.  Experiments where light is seen as a particle must have something else going on.  Such as the light wave interacting with physical matter in a way we don't yet understand.