My Planet - progress report #7

Houston. We have problem.

My moon in crisis.  Where has the little colony ship gone?

After successfully colonising the moon of my planet with 100 people and full supplies, our intrepid astronauts got to work exploring their new would and, erm, reproducing at a startling rate.  There were 133 astronauts and astro-babies when I went to work, but only 89 when I arrived home.