Is it enough for a planet to be in a habitable zone for life to exist? Any planet standing there would have to receive strong radiation from its parent star. It will eventually melt the planet's atmosphere. (But the thick...
Volcanic snails. They are found in hot volcanic springs in the ocean. Their shells have three layers.The outer layer contains iron sulfides.The middle layer is like the shell of normal snails.The innermost layer is made up of aragonite. Its scientific...
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