Cheap Astronomy investigates future space travel possibilities and finds that Helium 3 is floating on thin air and a Mars mission will happen when robots are ready to accompany us.

Cheap Astronomy investigates future space travel possibilities and finds that Helium 3 is floating on thin air and a Mars mission will happen when robots are ready to accompany us.
Cheap Astronomy investigates some cosmological hypotheses and remains everyone they are just hypotheses
A Borg-like species seems technically and biologically feasible. How would we humans measure up against such a threat? Is the artificial gravity we see in Star Trek really possible?