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Life

Life on Earth

The timeline of life evolving on Earth
Credit: LadyofHats

Life on Earth has taken billions of years to evolve. Life includes anything which can do the following things:

Space Exploration

Astronaut on EVA — An astronaut on an EVA (extravehicular activity) on the
International Space Station
Credit: NASA

Global Warming

Global Warming Indicators — Some of the indicators we use to determine the world is heating up.
Credit: US National Oceanic and Atmospheric Administration:

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