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Parfit argues that the size of the "cosmic endowment" can be calculated from the following argument: If Earth remains habitable for a billion more years and can sustainably support a population of more than a billion humans, then there is a potential for 10 16 (or 10,000,000,000,000,000) human lives of normal duration. [60]
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: Possible causes include a supernova [7] [8] or the Eltanin impact [9] [10] Middle Miocene ...
Arthur C. Clarke in 2001: A Space Odyssey (1968) has the claim that "Behind every man now alive stand 30 ghosts, for that is the ratio by which the dead outnumber the living", which was roughly accurate at the time of writing. [9] [10] Recent estimates of the "total number of people who have ever lived" are in the order of 100 billion.
Lists of people who disappeared include those whose current whereabouts are unknown, or whose deaths are unsubstantiated: Many people who disappear are eventually declared dead in absentia . Some of these people were possibly subjected to enforced disappearance , but there is insufficient information on their subsequent fates.
He disappeared shortly before he was to be released from prison in May 1999. His whereabouts are unknown; many human rights activists consider him dead. [123] 29 May 1999 Tammy Lamondin-Gagnon: 20 Newmarket, Ontario, Canada Lamondin, a young Ojibwe woman, disappeared on 29 May 1999 and was likely murdered after attending a house party. [124]
Life After People is a television series on which scientists, mechanical engineers, and other experts speculate about what might become of planet Earth if humanity suddenly disappeared. The featured experts also talk about the impact of human absence on the environment and the vestiges of civilization thus left behind.
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[102] [103] By 2000, there were approximately ten times as many people on Earth as there had been in 1700. However, this rapid growth did not last. During the period 2000–2005, the United Nations estimates that the world's population was growing at an annual rate of 1.3% (equivalent to around 80 million people), down from a peak of 2.1% ...