Deep sea mining - Wikipedia |
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Deep sea mining is a mineral retrieval process that takes place on the ocean floor. Ocean mining sites are usually around large areas of polymetallic nodules or active and extinct hydrothermal vents at 1 400 to 3 700 metres below the ocean's surface. |
Sperm whale - Wikipedia |
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Their circulatory system has adapted to dive at great depths, as much as 2 250 metres for up to 120 minutes.
The sperm whale brain is the largest known of any modern or extinct animal, weighing on average about 7.8 kilograms (with the smallest known weighing 6.4 kilograms and the largest known weighing 9.2 kilograms, more than five times heavier than a human's, and has a volume of about 8 000 cm3. |
Whale - Wikipedia |
Larger whales are also thought, to some degree, to engage in play. The southern right whale, for example, elevates their tail fluke above the water, remaining in the same position for a considerable amount of time. This is known as "sailing". It appears to be a form of play and is most commonly seen off the coast of Argentina and South Africa. Humpback whales, among others, are also known to display this behaviour. |
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