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There are only two currently living species of bramble shark in existence today – Echinorhinus cookei and Echinorhinus brucus. The picture above shows Echinorhinus brucus. They live off the coast of Argentina, Chile, and in the Indian Ocean typically at depths of 1,300–3,000 feet so they are rarely…

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Unlike humans, who depend on oxygen to breathe, bacteria have the ability to breathe many other molecules besides oxygen. While most of our Earth is soaked in oxygen, there are areas that have little to none. In sediments at the bottom of lakes, oceans and marshes, oxygen is consumed rapidly within few centimeters…