I was asking because if predators really breathe 1% more oxygen, and 4% more nitrogen than humans, that means they breath 5% more oxygen-nitrogen (combined). On wikipedia we could get that the percentage of oxygen-nitrogen (combined) is 99.03%, so only 0.97% of Earth's atmosphere consists on other gases. If Yautja Prime has really 5% more oxygen-nitrogen than Earth's, it can only be because it's much bigger, thus its atmosphere is denser, maybe much denser. Comments?