Segmentation of the vertebrate body is first established during embryogenesis by the periodic formation of pairs of somites — for example, every 120 minutes in mouse, 90 minutes in chicken and 30 ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Kathryn Rath Kathryn Rath is a writer covering audio, video, and smart-home ...