Watch how unhatched birds get oxygen inside their shells

by
Andrea James
from on (#3Q1Q3)
egg-breathe-01.png?fit=600%2C323&ssl=1

How birds get oxygen inside their eggs. File this great explainer under "questions previously unconsidered that have interesting answers." (more")

d2QjtXTvbgo
External Content
Source RSS or Atom Feed
Feed Location http://feeds.boingboing.net/boingboing/iBag
Feed Title
Feed Link http://feeds.boingboing.net/
Reply 0 comments