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Definition
| evidence of the presence of life, especially a global indication of life on a planet that could be detected remotely (such as an unusual atmospheric composition) |
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Term
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Definition
| an environment capable of hosting life |
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Definition
| the region around a star in which liquid water could exist on the surface of terrestrial-sized planets, hence the most probable place to look for life in a star’s planetary system |
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Term
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Definition
| a complex sequence of chemical reactions through which some living things can use sunlight to manufacture products that store energy (such as carbohydrates), releasing oxygen as one by-product |
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