How Can an Animal Breathe Without Oxygen?

Animals need oxygen in order to live -- or so we thought. Learn about a tiny parasite that evolved to do without it in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/life/cellular-microscopic/animal-doesnt-need-oxygen.htm Learn more about your ad-choices at https://www.iheartpodcastnetwork.com