Oxygen: A Matter of Life and Death
The Infinite Monkey Cage
00:00
Is There Any Oxygen in the Atmosphere?
Oxygen is one of the key signals a planet with oxygen in the atmosphere, you know that there has to be life there. It's so reactive that it's going to react away from the atmosphere as fasts as it's being made. And and it was first made on earth by tiny creatures. Er, er, the first appearance of sciona bacteria, the first creatures to do photo synthesis. But here's the really cool thing about it. As the oxygen began to get builled up more than 600 million years ago, you got the very first animals. You got the first moulti celled creatures who got the first eyes and teeth and legs and cells and brains and
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