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The Giraffidae are a family of ruminant artiodactyl mammals that share a recent common ancestor with deer and bovids.This family, once a diverse group spread throughout Eurasia and Africa, presently comprises only two extant genera, the giraffe (between one and eight, usually four, species of Giraffa, depending on taxonomic interpretation) and the okapi (the only known species of Okapia).
Some biologists suggest the modern giraffes descended from G. jumae; [10] others find G. gracilis a more likely candidate. G. jumae was larger and more robust, while G. gracilis was smaller and more slender. [6] The changes from extensive forests to more open habitats, which began 8 mya, are believed to be the main driver for the evolution of ...
The marsupial lion, Thylacoleo carnifex, had retractable claws, the same way the placental felines do today. [25] Microbats, toothed whales and shrews developed sonar-like echolocation systems used for orientation, obstacle avoidance and for locating prey. Modern DNA phylogenies of bats have shown that the traditional suborder of echolocating ...
Darwin's book introduced the scientific theory that populations evolve over the course of generations through a process of natural selection, although Lamarckism was also included as a mechanism of lesser importance. The book presented a body of evidence that the diversity of life arose by common descent through a branching pattern of evolution.
He spends much of the doc quoting Maurice Maeterlinck’s 1907 book, “The Intelligence of Flowers.” There is, perhaps, consciousness at work — in flowers, in fungi, in animals.
The number of giraffes has decreased by nearly 30% since the 1980s, per the Giraffe Conservation Foundation Giraffes Need Protections of Endangered Species Act After Declining Numbers, U.S ...
The IUCN currently recognizes only one species of giraffe, with nine subspecies, one of which is the Nubian giraffe. [1] The Nubian giraffe, along with the whole species, were first known by the binomen Cervus camelopardalis described by Swedish zoologist Carl Linnaeus in the Systema Naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis ...
Author Debra Young Hatch signs copies of her children's book, "Giraffes in My Closet," at Barnes & Noble Friday, June 21, 2024.