You get back into your time machine with your wacky professor and take off again.As your time machine lands,you see an unusual landscape before you.As you open the door you realize you cannot breathe.You quickly shut the door,realizing you are in the _____.

Question

Quizplus · Accepted Answer

The early Precambrian period, which began around 4.6 billion years ago, had an atmosphere that was mostly composed of methane, ammonia, and water vapor, with very little oxygen. This would make it impossible for humans to breathe without special equipment. The other options listed have either too much oxygen (late Cenozoic) or are too recent in Earth's history to have an atmosphere that we couldn't breathe (late Precambrian and early Mesozoic).

You Get Back into Your Time Machine with Your Wacky