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13 hours ago · Of the 47 hand bones the researchers studied, three were found to contain stress fractures. Of the feet, 281 bones were studied and 17 were found to have stress fractures. The stress fractures in the foot bones "were distributed to the proximal phalanges" and occurred across all three weight-bearing toes in "statistically indistinguishable ...
13 hours ago · A paleontologist at work at John Day Fossil beds National Monument. Paleontology (/ ˌ p eɪ l i ɒ n ˈ t ɒ l ə dʒ i, ˌ p æ l i-,-ən-/ PAY-lee-on-TOL-ə-jee, PAL-ee-, -ən-), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to the start of the Holocene epoch (roughly 11,700 years before present).
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What is a skeleton in zoology?
What is a skeleton in zoology?
13 hours ago · Many sponges have internal skeletons of spicules (skeletal-like fragments of calcium carbonate or silicon dioxide), and/or spongin (a modified type of collagen protein). An internal gelatinous matrix called mesohyl functions as an endoskeleton , and it is the only skeleton in soft sponges that encrust such hard surfaces as rocks.
13 hours ago · He adds that, by this framework, "(subjective) sexual attraction is the psychological core of sexual orientation", and also addresses that there may be "some skepticism in [both] the academic and clinical communities" about classifying asexuality as a sexual orientation, and that it raises two objections to such a classification: First, he ...
- Black for asexuality; gray for gray-asexuality; white for allosexuality; purple for community
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13 hours ago · The main challenge of this work is to obtain a genetic point of comparison, either from the remains of a Lost Colonist or one of their descendants. While it is conceivable to sequence DNA from 430-year-old bones, there are as yet no bones from the Lost Colony to work with. And, as of 2019, the project had yet to identify any living descendant.
13 hours ago · Crocodilia (or Crocodylia, both / k r ɒ k ə ˈ d ɪ l i ə /) is an order of mostly large, predatory, semiaquatic reptiles known as crocodilians.They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria.
13 hours ago · The Great Pyramid of Giza [a] is the largest Egyptian pyramid. It served as the tomb of pharaoh Khufu, who ruled during the Fourth Dynasty of the Old Kingdom. Built c. 2600 BC, over a period of about 27 years, the pyramid is the oldest of the Seven Wonders of the Ancient World, and the only wonder that has remained largely intact. It is the most famous monument of the Giza pyramid complex ...
