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News Link • Space Travel and Exploration

New Way to Make Oxygen Doesn't Need Plants

• http://www.livescience.com, By Tanya Lewis

It's widely believed that the rise of plants turned that carbon dioxide into oxygen through the chemical reactions of photosynthesis, in a period called the Great Oxygenation Event. But a new study suggests there may be another way to make oxygen from carbon dioxide, using ultraviolet light.

The findings could explain how the Earth's atmosphere evolved, and hint at a way to make oxygen in space, the researchers said.

Earth's atmosphere wasn't always full of life-giving oxygen — it was once a choking mixture of carbon dioxide and other gases, more like the atmosphere of Mars or Venus.

It's widely believed that the rise of plants turned that carbon dioxide into oxygen through the chemical reactions of photosynthesis, in a period called the Great Oxygenation Event. But a new study suggests there may be another way to make oxygen from carbon dioxide, using ultraviolet light.

The findings could explain how the Earth's atmosphere evolved, and hint at a way to make oxygen in space, the researchers said.

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