Discovered on the website Tabletop Whale (known for their imaginative science infographics) and created by Eleanor Lutz, this stunning animated GIF demonstrates a human’s embryo and fetus development from fertilization to birth.  Each point on the spiral timeline is annotated with a description of the development stage along with the number of weeks that would have passed since the mother’s last menstrual cycle.

Click to see a larger, more legible version.

How to Build a Human (animated GIF)