Talk:Standard O₂ Tank/@comment-99.240.224.60-20150425045352/@comment-66.130.72.198-20150509180417

And by that same logic, our character's initial 40 seconds * 20 = 800 seconds, or about 13 minutes... Humanity became mutants! :D

In more seriousness, though, you can't use the day and night cycle to determine how long the tank lasts, simply because we're not on Earth. If we were on Earth, your calculations would be correct, but since we're on this weird alien planet, the whole day / night cycle is completely different.

Let's just take Mercury, the smallest planet of our solar system, as an example. A day, on Mercury, is as long as 176 days on Earth. A year, on Mercury, is as long as 88 days on Earth. A mercurian day lasts for two mercurian years; one year is daytime, the other is nightime.

Different planets mean completely different cycles. It wouldn't be surprising for this alient planet to really have a cycle of around 1 hour in length.