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Home > 25. Early Earth and Life Processes > Extreme Chemical Environments
Podcast: 25. Early Earth and Life Processes
Episode:

Extreme Chemical Environments
Category: Science & Medicine
Duration: 00:00:56
Publish Date: 2011-07-28 08:54:57
Description: Transcript: Certain life forms can exist under extreme chemical conditions. Examples include halophiles that prefer a high salt concentration, above five percent all the way up to thirty percent. For comparison, seawater has a salt concentration of three percent, and it’s toxic to humans. Environments where halophiles exist might be a great salt lake or other salty environments, either on land or in the ocean. Other examples of important organisms on Earth that have extreme chemical conditions are anaerobes or oxygen hating organisms. These often use sulfur dioxide or carbon dioxide for their respiration. Examples include mammals intestinal tracts, ocean sediments, and hydrothermal vents deep on the ocean floor.
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