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In mythology, birds were sometimes monsters, like the Roc and the Māori's Pouākai, a giant bird capable of snatching humans. [96] In Persian mythology, the simurgh was a gigantic bird, the first to come into existence, and it nested on the tree of plant life that grew in the great ocean beside the tree of immortality.
The extinction was biased toward larger-sized species because smaller species have greater resilience because of their life history traits (e.g., shorter gestation time, greater population sizes, etc.). Humans are thought to be the cause because other earlier immigrations of mammals into North America from Eurasia did not cause extinctions. [216]
Map of early human migrations based on the Out of Africa theory; figures are in thousands of years ago (kya). [1]The peopling of the Americas began when Paleolithic hunter-gatherers (Paleo-Indians) entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the ...
There is a two-way interplay between human attitudes, beliefs, and symbols concerning fish, such as in Christianity, and people's practical use of and dependency on fish: "Fish not only guarantee the necessities of human life as food for the world, but they also establish human and fish relationships that link social, cultural, traditional, and ...
A turning point came in the early twentieth century with the writings of Gerhard Heilmann of Denmark.An artist by trade, Heilmann had a scholarly interest in birds and from 1913 to 1916, expanding on earlier work by Othenio Abel, [12] published the results of his research in several parts, dealing with the anatomy, embryology, behavior, paleontology, and evolution of birds. [13]
Human civilization has caused the loss of 83% of all wild mammals and half of plants. [29] The world's chickens are triple the weight of all the wild birds, while domesticated cattle and pigs outweigh all wild mammals by 14 to 1.
Orconectes virilis (virile crayfish) native to North America, but now widespread outside its normal habitat; Pacifastacus leniusculus (signal crayfish) into California from elsewhere in North America; Procambarus clarkii (red swamp crawfish) now widespread in North America, from its native range in the Gulf of Mexico basin
Hardy's hypothesis as outlined in New Scientist was: . My thesis is that a branch of this primitive ape-stock was forced by competition from life in the trees to feed on the sea-shores and to hunt for food, shell fish, sea-urchins etc., in the shallow waters off the coast.