A common origin shared by teeth and taste buds in a fish that has regenerative abilities has been identified by a team of researchers from the UK and the States. Regulated by the BMP signalling pathway, the results suggest ...
Molecular & Computational Biology
22 hours ago
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359
Research published this Wednesday (August 14th) in Scientific Reports describes Clevosaurus hadroprodon, a new reptile species from Rio Grande do Sul state in southern Brazil. Its fossils remains—jaws and associated skull ...
Archaeology & Fossils
Aug 14, 2019
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265
Unlike people, crocodiles do not clean their teeth to slow down wear and tear. Instead, they get rid of them and replace them with new copies.
Plants & Animals
Aug 13, 2019
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155
Despite their large body size, gorillas are known to have a vegetarian diet consisting almost exclusively of leafy vegetation and fruit. Their teeth are large and high-crested when compared to other great apes, which is usually ...
Plants & Animals
Aug 05, 2019
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125
Humans' distant ancestor Australopithecus africanus had a unique approach to raising their young, as shown in our new research published today in Nature.
Archaeology & Fossils
Jul 16, 2019
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398
Infants of the extinct human species Australopithecus africanus likely breast fed for up to a year after birth, similar to modern humans but of shorter duration than modern day great apes, according to an analysis of fossil ...
Archaeology & Fossils
Jul 15, 2019
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241
Mackerel sharks (Lamniformes) are a group consisting of some of the most iconic sharks we know, including the mako shark (the fastest shark in the world), the infamous great white shark, and Megalodon, the biggest predatory ...
Plants & Animals
Jul 05, 2019
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Based on careful study of fossilized teeth, scientists Keegan Melstom and Randall Irmis at the Natural History Museum of Utah at the University of Utah have found that multiple ancient groups of crocodyliforms—the group ...
Archaeology & Fossils
Jun 27, 2019
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High-resolution microscopic images of the surface of dental enamel of lepidosauria, which is a subclass of reptile including monitor lizards, iguanas, lizards and tuatara, allow scientists to determine their dietary habits. ...
Plants & Animals
Jun 21, 2019
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Modern hyenas are known as hunters and scavengers in Asian and African ecosystems such as the savanna.
Archaeology & Fossils
Jun 18, 2019
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Teeth (singular tooth) are small whitish structures found in the jaws (or mouths) of many vertebrates that are used to tear, scrape, and chew food. Some animals, particularly carnivores, also use teeth for hunting or defense. The roots of teeth are covered by gums. Teeth are not made of bone, but rather of tissues of varying density and hardness.
Teeth are among the most distinctive (and long-lasting) features of mammal species. Paleontologists use teeth to identify fossil species and determine their relationships. The shape of the animal's teeth are related to its diet. For example, plant matter is hard to digest, so herbivores have many molars for chewing. Carnivores, on the other hand, need canines to kill prey and to tear meat.
Mammals are diphyodont, meaning that they develop two sets of teeth. In humans, the first set (the "baby," "milk," "primary" or "deciduous" set) normally starts to appear at about six months of age, although some babies are born with one or more visible teeth, known as neonatal teeth. Normal tooth eruption at about six months is known as teething and can be painful.
Some animals develop only one set of teeth (monophyodont) while others develop many sets (polyphyodont). Sharks, for example, grow a new set of teeth every two weeks to replace worn teeth. Rodent incisors grow and wear away continually through gnawing, maintaining relatively constant length. Many rodents such as voles (but not mice) and guinea pigs, as well as rabbits, have continuously growing molars in addition to incisors.
This text uses material from Wikipedia, licensed under CC BY-SA
