- No Joke: Pigs and Rodents Can Breathe Through Their Butts SciTechDaily
- Breathing Through the Rectum Saves Oxygen-Starved Mice and Pigs The New York Times
- Pigs And Rodents Can Breathe Through Their Butts, New Study Reveals IFLScience
- Pigs can breathe through their butts. Can humans? Livescience.com
- Anal oxygen administration may save lives The Economist
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Source: Google Finance – Market News