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This list includes well-known general theories in science and pre-scientific natural philosophy and natural history that have since been superseded by other scientific theories. Many discarded explanations were once supported by a scientific consensus , but replaced after more empirical information became available that identified flaws and ...
Dong-Pyou Han (US), former assistant professor of biomedical sciences at Iowa State University, added human antibodies to samples of rabbit blood in an effort to falsely enhance the utility of an experimental HIV vaccine. [72] [73] In 2015 Han was sentenced to nearly five years in prison and ordered to return $7.2 million to the NIH. [74]
Humans did not evolve from either of the living species of chimpanzees (common chimpanzees and bonobos) or any other living species of apes. [174] Humans and chimpanzees did, however, evolve from a common ancestor. [175] [176] This most recent common ancestor of living humans and chimpanzees would have lived between 5 and 8 million years ago. [177]
Homochirality is an obvious characteristic of life on Earth, yet extraterrestrial samples contain largely racemic compounds. [7] It is not known whether homochirality existed before life, whether the building blocks of life must have this particular chirality, or whether life must be homochiral at all.
However at the last moment the landing parachute failed to open and the return capsule smashed into the ground at high speed, contaminating the samples. The parachute failure was traced to an accelerometer installed backwards. Palace II, Brazil; parts of it collapsed, due to engineering error, killing eight people. Quebec Bridge collapses
The Earth will naturally become uninhabitable due to the Sun's stellar evolution, within about a billion years. [148] In around 1 billion years from now, the Sun 's brightness may increase as a result of a shortage of hydrogen , and the heating of its outer layers may cause the Earth's oceans to evaporate, leaving only minor forms of life. [ 149 ]
Thomas Edison once said, "I have not failed.I've just found 10,000 ways that won't work." From show business and athletics to tech and the corporate world, the giants of every industry have one ...
A reconstruction of the skull purportedly belonging to the Piltdown Man, a long-lasting case of scientific misconduct. Scientific misconduct is the violation of the standard codes of scholarly conduct and ethical behavior in the publication of professional scientific research.