Smell wiring gets set early

Mess with a baby mouse’s olfaction for too long and neurons never recover

SORTING SMELLS  Odor-detecting neurons in the mouse nose (green and magenta) latch onto certain scents and send signals to precise locations. The neurons each have a diameter of approximately 10 micrometers.

Ron Yu and Limei Ma

The intricate neural wiring that carries smells to the brain locks into place soon after birth, two new mouse studies suggest.