A friend of mine who grew up in Huntsville, Alabama says it was “common knowledge” when he was growing up that the Apollo 1 fire was caused by a peanut butter sandwich smuggled into the 100% oxygen atmosphere in the test capsule. The alleged sandwich then allegedly caught fire, and we were short three astronauts.
My friends and I, upon hearing this, were incredulous, but couldn’t rule it out. Thus, we turn to you:
Is the oil content in peanut butter sufficiently high that it will spontaneously combust at high partial pressures of oxygen? Is it metastable? Is it just a sandwich spread?