You are the lucky student of a wacko professor who develops a time machine. He asks if you will test it with him. You get in, and there is an immediate glitch-the date readout fails so that when you land, you are not sure what era you are in. As your time machine lands, you see an unusual landscape before you. As you open the door, you realise you cannot breathe. You quickly shut the door, realising you are in the ________.

Question

Quizplus · Accepted Answer

The Archaean eon is the earliest eon of the Earth's history (4 to 2.5 billion years ago) when the atmosphere did not contain oxygen and the surface of the Earth was largely inhospitable to life as we know it. Therefore, it is possible that the atmosphere of the Archaean eon could have been toxic to humans, making it impossible to breathe outside the time machine.

You Are the Lucky Student of a Wacko Professor Who