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Another hypothesis is that it is actually intelligence that causes social relationships to become more complex, because intelligent individuals are more difficult to learn to know. [24] There are also studies that show that Dunbar's number is not the upper limit of the number of social relationships in humans either. [25] [26]
The Rare Earth hypothesis argues that planets with complex life, like Earth, are exceptionally rare.. In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity, such as sexually reproducing, multicellular organisms on Earth, and subsequently human intelligence, required an improbable combination of astrophysical ...
The firstborn hypothesis is a special case of the Hart–Tipler conjecture (the idea that the lack of evidence for interstellar probes is evidence that no intelligent life other than humanity exists in the universe) which asserts a time-dependent curve towards discovery. [1]
Several experiments cannot be readily reconciled with the belief that some animal species are intelligent, insightful, or possess a theory of mind. Jean-Henri Fabre [159] (1823–1915), setting the stage for all subsequent experiments of this kind, argued that insects "obey their compelling instinct, without realizing what they do". For ...
His analysis identified mammoths and mastodons as distinct species, different from any living animal, and effectively ended a long-running debate over whether a species could become extinct. [62] In 1788, James Hutton described gradual geological processes operating continuously over deep time . [ 63 ]
Additionally, in the episode "The Chase (TNG)", a message from a first (or early) civilization is discovered, hidden in the DNA of sentient species spread across many worlds, something that could only have been fully discovered after a race had become sufficiently advanced.
Natural Born Killers would appear in theaters in the summer of 1994, just as the twenty-four-hour news cycle was tightening its stranglehold on American life. CNN came on the air June 1, 1980, and ...
Species go extinct constantly as environments change, as organisms compete for environmental niches, and as genetic mutation leads to the rise of new species from older ones. 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 ...