GhoternLit

Say you have a room, the dimensions are 20’ x 20’ x 20’. Inside of it you put an elephant and a mouse. You then seal the room, airtight. Which one would suffocate first? Assume that they mouse and elephant do not interact in any way, e.g. the elephant does not lie down and crush the mouse. They are also not expending too much energy, as in running around the enclosed space. Since the mouse has smaller lungs, will it die first, not being able to draw in as much oxygen as the elephant? Or will the elephant go first, since it requires much more oxygen than the mouse? Are there more factors here at work? Will they die at the same time? By the way, this is purely theoretical, I wish no harm to neither mice nor elephants.