NOVA: Finding Life Beyond Earth -watch this!
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NOVA: Finding Life Beyond Earth -watch this!
Maybe we will have to re-think what life is, or how it can be expressed. Maybe a sea of methane is quite comfortable for some fish?
"The answer lies in three key ingredients. First, all life is made up of organic molecules consisting of carbon, in compounds that include nitrogen, hydrogen and oxygen, among others. Although organic molecules aren't alive themselves, they are the basic building blocks of every living organism.
Life also needs a liquid, like water. In water, the basic organic molecules can mix, interact and become more complex.
The last ingredient is an energy source, like the sun, to power the chemical reactions that drive all life, from the smallest microbe to us.
When these three ingredients came together, billions of years ago, life found a way to take hold, and, today, persists, even in the most extreme environments, like here: this is the Mojave Desert, Nevada. It is one of the hottest, driest places on our planet."
This is a video with excellent graphics, and shows some newer ideas and data.
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