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Teeth in Biological News

Healing power of aloe vera proves beneficial for teeth and gums, too

... vera in tooth gels is used to cleanse and soothe teeth and gums, and is as effective as toothpaste to ... is a great alternative for people with sensitive teeth or gums. But buyers must beware. Not all aloe ... purposes. "Thankfully, consumers with sensitive teeth or gums have a number of choices when it comes to ...

CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness

... and oxygen isotopes extracted from the fossil teeth of three varieties of mammals from Ellesmere ... rhino-like mammal known as brontothere. Animal teeth are among the most valuable fossils in the high ... An analysis of oxygen isotopes from the fossil teeth helped determine seasonal changes in surface ...

A combined tooth-venom arsenal revealed as key to Komodo dragon's hunting strategy

... is a combination of highly specialized serrated teeth and venom. The authors also dismiss the widely ... in length. They have around 60 highly serrated teeth which are frequently replaced during their ... complex venom glands and specialised serrated teeth which create deep lacerations for entry of the ...

Focus on the formation of bones, teeth and shells

... the process that leads to the formation of bones, teeth and sea shells. They used the world's most ... greater understanding of the formation of bones, teeth and shells. This creates a prospect of better ... in a biological environment, familiar from bones, teeth and shells. The formation of the mineral is quite ...

Home tooth bleaching slightly reduces enamel strength

... COLUMBUS, Ohio New research shows that human teeth lost some enamel hardness after the application ... these side effects. The researchers noted that teeth typically can restore their previous hardness ... measuring in billionths of a meter how human teeth are affected by the popular home whiteners. ...

Teeth of Columbus' crew flesh out tale of new world discovery

... the chemical details of life history from the teeth of crew members Christopher Columbus left on the ... of diet at the time an individual's adult teeth emerge in childhood. For example, people who eat ... as a child. Three of the individuals whose teeth were subjected to isotopic analysis by the ...

Scientists discover why teeth form in a single row

... study may help guide efforts to re-grow missing teeth and prevent cleft palate, one of the most common ... face takes shape in the womb, the development of teeth and palate are tightly controlled in space and ... abnormalities result in the development of teeth outside of the normal row, ...

Toothsome research: Deducing the diet of a prehistoric hominid

... and strains at play in complex shapesto the teeth and jaws of A. africanus , an African hominid ... are of great importance to anthropologists. teeth are the hardest parts of the body, and so are the ... years. Careful examination of subtle features of teeth and jaws can reveal what an animal could eat, ...

Early whales gave birth on land, fossil find reveals

... bones found together. "When I first saw the small teeth in the field, I thought we were dealing with a ... whales' lifestyle is the well-developed set of teeth in the fetus, suggesting that Maiacetus newborns ... is 12 percent larger overall, and its canine teeth or fangs 20 percent larger. Such size ...

February 2009 Geology and GSA Today media highlights

... systems on the ancient sub-Himalayan plain. The teeth were sampled along a 32-km transect within a time slice of about 150,000 years. Fossil teeth from the southwestern end have more of the heavier 13-C isotope compared with fossil teeth from the northeastern end, evidence that there ...

Early humans had 'jaws of steel'

... Your mother always told you not to use your teeth as tools to open something hard, and she was right. Human skulls have small faces and teeth and are not well-equipped to bite down forcefully ... "We meshed those data with another specimen with teeth to make the virtual model of the bone and tooth ...

January GEOLOGY media highlights

... preserved in French amber, tiny fossil fish teeth recovered by the Ocean Drilling Program, and ... 32611, USA. Pages 87-90. Tiny fossil fish teeth found in deep sea sediments record past ... past ocean circulation patterns. Nd data from teeth recovered from Ocean Drilling Program sites in ...

New book further supports controversial theory of 'Man the Hunted'

... were basically smallish bipedal primates. Their teeth were relatively small, very much like modern ... afarensis didn't have tools, didn't have big teeth and was three feet tall. He was using his brain, ... preyed upon according to evidence that includes teeth marks on bones, talon marks on skulls and holes ...

Little teeth suggest big jump in primate timeline

... DURHAM, N.C. -- Tiny fossilized teeth excavated from an Indian open-pit coal mine could ... Just 9-thousandths of a square inch in size, the teeth are about 54.5 million years old and suggest ... about 2 to 3 ounces. Studies of the shape of the teeth suggest these small animals could live on a fruit ...

End in sight for the dreaded dentist drill

... the tooth. Researchers were able to tell healthy teeth from carious teeth because bacteria, responsible for the decay, ... project, is planning a larger trial using more teeth samples and hopes to move onto human trials soon. ...

Tooth loss strongly linked to risk of esophageal, head and neck, and lung cancer

... neck, and lung. They suggest that preservation of teeth may decrease risk of developing these diseases. ... cancer increased proportionally to the number of teeth a patient had lost. These increased risks ... to cancer risk. Furthermore, people who have lost teeth may not be able to eat a healthy diet, and diet ...

Ancient 'Nutcracker Man' challenges ideas on evolution of human diet

... Tiny marks on the teeth of an ancient human ancestor known as the ... looked at rough geometric shapes on the teeth of several Nutcracker Man specimens and ... Foundation. The researchers examined the teeth of Paranthropus boisei, an ancient hominin that ...

Tooth Bank seeks milk teeth from 100,000 children

... The Norwegian Tooth Bank is requesting milk teeth from 100 000 children in Norway and could become the biggest tooth bank in the world. Milk teeth can give unique information about environmental ... MoBa to deposit one or more of their childs milk teeth to the new bank. ...

Fossil bone bed helps reconstruct life along California's ancient coastline

... In the famed Sharktooth Hill Bone Bed near Bakersfield, Calif., shark teeth as big as a hand and weighing a pound each, intermixed with copious bones ... to the sea. Pyenson and Irmis examined some 3,000 fossilized bone and teeth specimens in the collections of many museums, including the NHM and UCMP, ...

New dinosaur species possible in Northwestern Alberta

... nesting site and found the remains of baby, plant-eating dinosaurs and the teeth of a predator. The researchers matched the teeth to a Troodon, a raptor-like dinosaur about two metres in length. This ...

True grit

... dig themselves hiding holes in the limestone of the ocean floor using teeth that don't go blunt. Weizmann Institute scientists have now revealed their ... of Sciences (PNAS), USA. The scientists found that the sea urchins' teeth contain crystals of magnesium calcite, which are smaller, harder and ...

Early whales gave birth on land

... Another clue to the whales' lifestyle is the well-developed set of teeth in the fetus, suggesting that Maiacetus newborns were equipped to fend for ... virtually complete skeleton is 12 percent larger overall, and its canine teeth 20 percent larger. Such size discrepancies are not uncommon among ...

Tom Cruise smile comes with a sunburn price

... teeth. She saw more exposed grooves on the enamel surface of bleached teeth than on unbleached teeth. These grooves make the teeth more vulnerable to mechanical stress. Tooth bleaching is one of the ...

Decline of carbon-dioxide-gobbling plankton coincided with ancient global cooling

... to another fossil record: horse teeth. Before grasslands, horses had small teeth suited for chewing soft leaves. But as grasslands appeared, much hardier teeth appeared adapted to a lifetime of chewing tough, silica-studded grass ...

Long-term study shows effect of climate change on animal diversity

... What happened next can be reconstructed from the chemistry and wear of the teeth of the plant-eating mammals, as well as the longevity of each species during the period when vegetation was changing. The teeth provide evidence of the animals' diets, revealing whether they switched to ...

USC researchers identify alternate pathway that leads to palate development

... replacement for Smad4 during oral development when Smad4 is nonfunctional, teeth only partially form but the results are still surprising for a molecule ... and clinicians. "This information is useful not just for palate and teeth but also for cancer and cell biology in general," he says. "Ultimately, we ...

Big brains arose twice in higher primates

... or New World "monkeys." Most fossils are fragments of skulls or teeth so, to help in estimating their body size (and then E.Q.), Flynn and colleagues collected 80 measurements of the skulls, jaws, and teeth of 17 different species of living New World monkeys that ranged across the ...

Marsupial lion tops African lion in fight to death

... suggests that Thylacoleo killed prey rapidly, using its bolt-cutter type teeth to scissor through hide and flesh to produce major trauma and blood loss. ... with an African lion of similar size, it could have use its deadly cheek teeth and incredibly powerful arms to inflict mortal wounds on the mammal, Wroe ...

Story tips from the Department of Energy's Oak Ridge National Laboratory, December 2007

... MATERIALS -- Tougher teeth . . . Artificial teeth and crowns made of ceramic material are doomed to fail usually within six ...

Dinosaur from Sahara ate like a 'mesozoic cow'

... that had a mouth that worked like a vacuum cleaner, hundreds of tiny teeth and nearly translucent skull bones will be unveiled Thursday, Nov. 15, at ... one wore out, another immediately took its place. There were more than 500 teeth in total, with a new tooth in each column joining the scissors edge every ...

Bizarre walking bat has ancient heritage

... plant that produces nectar from blooms near ground level at the base of tree trunks. Among other unusual traits, the bat is thought to use its teeth and claws to excavate roosting burrows and males appear to compete for mates by gathering for singing competitions in their breeding season. ...

New discovery suggests trees evolved camouflage defense against long extinct predator

... colouring may also reduce the probability of leaf outlines and help camouflage leaves against the sunlight-draped forest floor. Moa also lacked teeth and swallowed leaves by placing them in their bills and snapping their head forward. The long rigid leaves produced by P. crassifolius would have ...

New theory on why male, female lemurs same size

... for having odd traits not found in other primates. For example, some lemurs hibernate, storing fat in their tails, and all have toothcombs -- teeth that are perfectly shaped for grooming. Lemurs also differ from other primates in another key respect that has also stymied primatologists for years: ...

The last supper of the hominids establishes the times they lived at the sites

... tarandus ). "This method allows us to confirm the seasonal nature of the occupation", Rivals added. According to the team, the microwear of the teeth is sensitive to seasonal changes in the diet. The application has allowed the researchers to estimate the length of the occupation of the site ...

OJ worse for teeth than whitening says Eastman Institute researchers

... meantime, Ren advises that consumers be aware of the acidic nature of beverages, including sodas, fruit juices, sports and energy drinks. The longer teeth are in contact with the acidic drinks, the more severe the erosion will be. People who sip their drinks slowly over 20 minutes are more likely to ...

Sands of Gobi Desert yield new species of nut-cracking dinosaur

... The unusual chewing style has solved a major mystery regarding the wear patterns on psittacosaur teeth. Psittacosaurs sported rigid skulls, but their teeth show the same sliding wear patterns as plant-eating dinosaurs with flexible skulls. ...

Fossil teeth of browsing horse found in Panama Canal earthworks

... By far the most complete fossil of a horse collected at the site in excavations spanning the last century, characteristics such as the shape of the teeth confirm the identity of two earlier finds and indicate that this horse was primarily a forest-dwelling browser living in the area between 15 and 18 ...

Cantabrian cornice has experienced seven cooling and warming phases over past 41,000 years

... started to carry out a paleontological survey in the cave of El Mirn. Since then they have focused on analysing the fossil remains of the bones and teeth of small vertebrates that lived in the Cantabrian region over the past 41,000 years, at the end of the Quaternary. The richness, great diversity and ...

Scholar unconvinced new lie-detection methods better than old ones

... have to lie so still," Littlefield said. "Protocols are such that if you didn't want to have your brain scanned, all you'd have to do is clench your teeth or move your head, and it would create artifacts in the images, and then you can't use them luckily." Still, she said, those promoting the newer, ...

Harvard scientist says we are what we eat -- and what we cook

... to biological evidence, which shows that around 1.8 million years ago, Homo erectus arose with larger brains and bodies and smaller guts, jaws, and teeth -- changes consistent with the switch to a more tender and energetically rich diet of cooked food. "Cooking is what makes the human diet 'human,' ...
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(Date:4/17/2014)... State University engineer has developed a patented technique ... explosive devices. The same technique could help police ... M. and Kay L. Theede chair in engineering ... and his research team have created a template-based ... car trunks. The distance detection method called ...
(Date:4/17/2014)... Calif. One day about eight years ago, ... California, Riverside, and her father were on a field trip ... upon an orchid they had never seen before. , Unable ... on orchids. The orchid turned out to be an ... Lophiaris silverarum . , "Lophiaris" is the genus name, ...
(Date:4/17/2014)... is available in German . ... the protection money demanded of him, he can expect his ... however, as fear of the consequences is enough to make ... parasitic birds, which lay their eggs in other birds, nests. ... brood parasites take their revenge by destroying the entire nest. ...
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(Date:4/17/2014)... Diego School of Medicine report that older women, plucky ... loss are more likely to be compassionate toward strangers ... in this month,s issue of the International Journal ... associated with better health and well-being as we age, ... the outcomes of individuals whose deficits in compassion put ...
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(Date:4/17/2014)... 2014 EcoHealth Alliance, a nonprofit organization that focuses ... comprehensive review today examining the current state of knowledge ... calls for improved global surveillance strategies to combat the ... of Ebola in West Africa that has claimed the ... and Liberia. According to the World Health Organization ...
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