Mapping how a single cell becomes an entire mouse
Growing inside each of us is a cellular family tree. Every one of the 37 trillion cells in our body is generated from another cell, going all the way back to a single fertilized egg. Much like we can draw a family tree tracking generations of our ancestors, scientists can also create family trees of cells, showing how they're related to each other.
We haven't written up this one. Phys.org has the full story — the link below goes straight to it.