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At long irregular intervals, Earth's biosphere suffers a catastrophic die-off, a mass extinction, [9] often comprising an accumulation of smaller extinction events over a relatively brief period. [10] The first known mass extinction was the Great Oxidation Event 2.4 billion years ago, which killed most of the planet's obligate anaerobes.
Extinction Date Probable causes [2] Quaternary: Holocene extinction: c. 10,000 BC – Ongoing: Humans [3] Quaternary extinction event: 640,000, 74,000, and 13,000 years ago: Unknown; may include climate changes, massive volcanic eruptions and Humans (largely by human overhunting) [4] [5] [6] Neogene: Pliocene–Pleistocene boundary extinction: 2 Ma
Jensen predicted that Halley's Comet would be pulled into Earth's orbit on this day, causing widespread destruction. [129] 17 Aug 1987 José Argüelles: Argüelles claimed that Armageddon would happen unless 144,000 people gathered in certain places across the world in order to "resonate in harmony" on this day. [130] 11–13 Sep 1988, 3 Oct 1988
For Earth Day on April 22, interesting facts ... More than 20 million people participated in the first Earth Day. Millions of people participated in the first Earth Day celebration on April 22 ...
Possibly overexploitation of eggs for consumption, environmental changes (natural or caused by human activity), and competition with the Nile crocodile. [135] c. 600: Ua Huka rail: Gallirallus gracilitibia: Ua Huka, Marquesas Islands Human settlement. [136] 600-765 [50] Monkey-like sloth lemur: Mesopropithecus pithecoides: Central Madagascar
Nuclear war is an often-predicted cause of the extinction of humankind. [1]Human extinction or omnicide is the hypothetical end of the human species, either by population decline due to extraneous natural causes, such as an asteroid impact or large-scale volcanism, or via anthropogenic destruction (self-extinction), for example by sub-replacement fertility.
[47] [48] Brain expansion (enlargement) between 0.8 and 0.2 Ma may have occurred due to the extinction of most African megafauna (which made humans feed from smaller prey and plants, which required greater intelligence due to greater speed of the former and uncertainty about whether the latter were poisonous or not), extreme climate variability ...
According to that same Outside article, “The lowest body temperature a human has been known to survive is 56.7 degrees [Fahrenheit], nearly 42 degrees below normal.”