One Cell, Two Cell...Wait ... Did You Just Say Two Cells?

This is huge.  Scientists watched yeast evolve from single celled organisms to multi-celled organisms. Save this link for theist conversations.

Test Tube Yeast Evolve Multicellularity

"After 35 generations, the yeast that were exposed to stronger selection evolved to have larger cluster sizes, whereas those in the weak selection group actually shrank in size. This indicated that each cluster of cells was evolving as one organism."