/sci/ - Science & Math

/sci/ I have an idea! I think that we are at a crossroads in human evolution. I believe there shall exist two divergent races. As long as the food supply doesn't change drastically over the next several hundred years. The two races, one smart and attractive(thinner), the other slower and gluttonous. I imagine the second will be better suited for constant exposure to micro-gravity and the prior will be saved for surface colonization.

Feel free to discuss.

If light hits a brick wall it stops. If wall hits light does wall stop?

Is this just stupid? Or is it theoretically possible that a shielding based of light could be used like a wall.