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Vor einer Stunde · Research is underway on turbine and generator designs which reduce the need for neodymium, or eliminate the use of rare-earth metals altogether. Additionally, the large wind turbine manufacturer Enercon GmbH chose very early not to use permanent magnets for its direct drive turbines, to avoid responsibility for the adverse environmental impact of rare-earth mining.
Vor einem Tag · If this doesn't work, raise a chargeback with your bank or credit card provider within 120 days of your purchase or payment to get a refund. "You need to push hard on chargebacks and cite 'breach ...
Vor einem Tag · Futurology. Political history. ↓ Future. v. t. e. Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers. They migrated out of Africa during the Last Ice Age and had populated most of the Earth by the end of the Ice Age 12,000 years ago.
Vor einem Tag · Signature. Sir Alfred Joseph Hitchcock KBE (13 August 1899 – 29 April 1980) was an English film director. He is widely regarded as one of the most influential figures in the history of cinema. [1] In a career spanning six decades, he directed over 50 feature films, [a] many of which are still widely watched and studied today.
Vor einem Tag · To Popper, pseudoscience uses induction to generate theories, and only performs experiments to seek to verify them. To Popper, falsifiability is what determines the scientific status of a theory. Taking a historical approach, Kuhn observed that scientists did not follow Popper's rule, and might ignore falsifying data, unless overwhelming. To Kuhn, puzzle-solving within a paradigm is science ...
Vor einem Tag · Earth's 1,335,000,000 cubic kilometers (320,000,000 cu mi) of sea contain about 97.2 percent of its known water and covers approximately 71 percent of its surface. [3] : 7 [17] Another 2.15% of Earth's water is frozen, found in the sea ice covering the Arctic Ocean , the ice cap covering Antarctica and its adjacent seas , and various glaciers and surface deposits around the world.
