Allan Hills 84001 | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-03-20

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Allan_Hills_84001


00:01:23 1 History and description
00:03:34 2 Hypothetical biogenic features
00:08:44 2.1 RNA world hypothesis
00:10:37 3 See also



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SUMMARY
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Allan Hills 84001 (commonly abbreviated ALH84001) is a Martian meteorite that was found in Allan Hills, Antarctica on December 27, 1984, by a team of U.S. meteorite hunters from the ANSMET project. Like other members of the group of SNCs (shergottite, nakhlite, chassignite), ALH84001 is thought to be from Mars. However, it does not fit into any of the previously discovered SNC groups. On discovery, its mass was 1.93 kilograms (4.3 lb).
In 1996, a group of scientists claimed to have found evidence for microscopic fossils of Martian bacteria in the meteorite, culminating in then U.S. president Bill Clinton giving a speech about the potential discovery. These claims were controversial from the beginning, and the wider scientific community ultimately rejected the hypothesis once all the unusual features in the meteorite had been explained without requiring life to be present. Despite there being no convincing evidence of Martian life, the initial paper and scientific and public attention caused by it are considered to be turning points in the history of the developing science of astrobiology.