/ en-us Â鶹ÒùÔº internet news portal provides the latest news on science including: Â鶹ÒùÔºics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. Losing your baby teeth is a strange experience. The teeth gradually loosen until they're replaced by thicker, more durable and permanent ones. But humans aren't the only animals capable of shedding teeth. In fact, most mammals have two sets of teeth throughout their life. And reptiles, amphibians, fish and sharks replace their teeth continuously throughout their lives. /news/2025-09-animals-reshape-teeth-scientists-ability.html Evolution Paleontology & Fossils Mon, 29 Sep 2025 11:40:04 EDT news678364801 A study published in the Journal of Archaeological Science: Reports analyzed three Maya children's teeth. These teeth exhibited jade inlays, a practice typically reported in adult Pre-Hispanic Maya teeth. /news/2025-08-maya-children-jade-tooth-inlays.html Archaeology Thu, 28 Aug 2025 06:50:01 EDT news675509145 Beneath churchyards in London and Lincolnshire lie the chemical echoes of famine, infection and survival preserved in the teeth of those who lived through some of the most catastrophic periods in English history. /news/2025-07-medieval-skeletons-reveal-childhood-malnutrition.html Archaeology Thu, 31 Jul 2025 12:50:06 EDT news673184539 Have you ever stopped by the grocery store on your way to a dinner party to grab a bottle of wine? Did you grab the first one you saw, or did you pause to think about the available choices and deliberate over where you wanted your gift to be from? /news/2025-07-guests-feast-iran-zagros-mountains.html Archaeology Fri, 11 Jul 2025 09:20:01 EDT news671444075 In 1931, the SkhÅ«l I fossil was uncovered at Mugharat es-SkhÅ«l (the Cave of the Children), also known as SkhÅ«l Cave, Israel. It forms part of the oldest intentional human burials ever discovered, dating back to ca. 140,000 years ago. For decades, it became the topic of much debate over its taxonomic classification. Today it is widely attributed to Homo sapiens. /news/2025-07-analysis-skhl-skull-oldest-human.html Archaeology Thu, 10 Jul 2025 06:30:01 EDT news671267501 The climate we live in affects our lives in profound ways: hot summers, cold winters, dry spells and wet weather all leave their mark. /news/2025-07-teeth-hidden-history-childhood-climate.html Earth Sciences Environment Wed, 09 Jul 2025 12:38:04 EDT news671283481 Evidence of the permanent impact of smoking on people's teeth has been uncovered by researchers for the first time. Researchers from Northumbria University have discovered that smokers have telltale signs of their smoking habits ingrained deep within their teeth, which remain even after a person has quit. /news/2025-06-analysis-tooth-uncovers-impact-clues.html Molecular & Computational biology Wed, 18 Jun 2025 13:42:21 EDT news669472936 The summer of 1975 was the summer of "Jaws." /news/2025-06-years-jaws-eater-myth-revealed.html Plants & Animals Evolution Wed, 18 Jun 2025 12:39:05 EDT news669469142 A new study of the Gobi Wall in the Gobi highland desert of Mongolia reveals a multifunctional role beyond defense; data from the James Webb Space Telescope is bringing physicists closer to resolving the Hubble tension; and a U.S.-based team of astronomers stumbled on a new dwarf planet in the outer solar system while searching for Planet Nine. /news/2025-05-saturday-citations-wages-welfare-teeth.html Other Sat, 31 May 2025 08:30:01 EDT news667823007 Ever wondered why our teeth are so sensitive to pain or even just cold drinks? It might be because they first evolved for a very different purpose than chewing half a billion years ago, a study suggested Wednesday. /news/2025-05-teeth-million-year-fish.html Paleontology & Fossils Sun, 25 May 2025 13:30:01 EDT news667052799 Anyone who has ever squirmed through a dental cleaning can tell you how sensitive teeth can be. This sensitivity gives important feedback about temperature, pressure—and yes, pain—as we bite and chew our food. However, the sensitive parts inside the hard enamel first evolved for something quite different. /news/2025-05-teeth-evolved-sensory-tissue-armored.html Evolution Paleontology & Fossils Wed, 21 May 2025 11:00:10 EDT news667039381 When children lose their baby teeth, there is an adult set already growing beneath the gums, ready to emerge. But if we lose our permanent teeth, there aren't any more waiting in the wings. Right now, the options for replacing these lost teeth are either dentures or titanium implants, neither of which provide the same function and feedback as a real, living tooth. /news/2025-04-pigs-regrow-adult-teeth-humans.html Cell & Microbiology Biotechnology Fri, 25 Apr 2025 17:05:20 EDT news664819509 Bone tools have been created by hominins for millions of years, with the earliest evidence for the manufacture of deliberately shaped bone tools dating to approximately 1.4 to 0.7 million years ago in Ethiopia. In Europe, the earliest evidence of bone tool production dates back to the Middle Pleistocene during Marine Isotope Stage (MIS) 11. /news/2025-04-earliest-evidence-ivory-tool-production.html Archaeology Thu, 10 Apr 2025 07:00:01 EDT news663422097 A new study published in PeerJ reveals that the teeth of South American sea lions (Otaria byronia) hold valuable clues about past population dynamics. Researchers from the Instituto de Biología de Organismos Marinos, the Centro para el Estudio de Sistemas Marinos, and the Universidad Nacional de la Patagonia San Juan Bosco analyzed changes in tooth size and growth layer groups (GLGs) over the past century. Their findings suggest that tooth size can serve as a reliable indicator of density-dependent effects on somatic growth. /news/2025-03-tooth-size-south-american-sea.html Ecology Paleontology & Fossils Sat, 08 Mar 2025 11:30:01 EST news660576522 Research led by the Department of Sociology & Anthropology at Ohio University has found evidence of hominin activity at a Romanian fossil site dating to at least 1.95 million years ago. This discovery pushes back the known date of European hominins by half a million years and establishes Grăunceanu as the oldest confirmed European evidence of hominin activity. /news/2025-01-romanian-fossils-hominins-europe-years.html Paleontology & Fossils Wed, 22 Jan 2025 14:44:50 EST news656779486 Babies were weaned earlier in cities in the Roman Empire than in smaller and more rural communities, according to a study of ancient teeth. Urban weaning patterns more closely hewed to guidelines from ancient Roman physicians, mirroring contemporary patterns of adherence to medical experts in urban and rural communities. /news/2025-01-ancient-teeth-reveal-roman-urbanites.html Archaeology Tue, 14 Jan 2025 09:52:03 EST news656070721 A UAB study in collaboration with the UVic-UCC and the ALBA synchrotron concludes that the Iberian culture newborns buried within domestic spaces died of natural causes, such as complications during labor or premature births, and not due to ritual practices. /news/2024-10-microscopic-teeth-reveals-mystery-iberian.html Archaeology Wed, 09 Oct 2024 14:37:04 EDT news647703421 How do you find out the age of a wild animal? For some Australian marsupials, we have discovered you can tell from their teeth. /news/2024-06-kangaroo-teeth-owner-age-sex.html Plants & Animals Sat, 22 Jun 2024 06:40:01 EDT news638188399 The Dental Anthropology Group at the Centro Nacional de Investigación sobre la Evolución Humana (CENIEH) has published a paper in the American Journal of Biological Anthropology on the morphological differences between the canines of men and women, underlining their importance in the creation of biological profiles. /news/2024-03-canine-teeth-reveal-keys-sex.html Evolution Molecular & Computational biology Fri, 01 Mar 2024 10:19:32 EST news628510762 Kilat, the largest living lizard at the Toronto Metro Zoo, like other members of his species (Varanus komodoensis), truly deserves to be called the Komodo dragon. His impressive size and the way he looks at you and tracks your every move makes you realize that he is an apex predator, not unlike a ferocious theropod dinosaur. /news/2024-02-adult-komodo-teeth-similar-theropod.html Plants & Animals Paleontology & Fossils Wed, 07 Feb 2024 14:38:03 EST news626539081 Evidence from teeth reveals that vitamin D deficiency during childhood was likely a major issue in industrialized England, according to a study published January 31, 2024 in the open-access journal PLOS ONE by Anne Marie Snoddy of the University of Otago, New Zealand and colleagues. /news/2024-01-archaeological-evidence-seasonal-vitamin-d.html Archaeology Wed, 31 Jan 2024 14:00:01 EST news625914950 The Dental Anthropology Group at the Centro Nacional de Investigación sobre la Evolución Humana (CENIEH) has published a study in the journal Anthropological Science, in collaboration with the University of Bordeaux (France) and the University of Pretoria (South Africa), which analyzes the differences between the canines of European and African individuals. /news/2023-11-differences-canine-teeth-european-african.html Evolution Thu, 09 Nov 2023 17:10:17 EST news618772215 The Oplegnathus punctatus (O. punctatus) is an economically significant marine aquaculture species. It possesses a distinct beak-like tooth phenotype, allowing it to feed on hard-shelled foods such as oysters and sea urchins. /news/2023-08-reveals-developmental-pattern-regenerative-mechanism.html Plants & Animals Molecular & Computational biology Wed, 16 Aug 2023 11:57:03 EDT news611405821 About 350 million years ago, your evolutionary ancestors—and the ancestors of all modern vertebrates—were merely soft-bodied animals living in the oceans. In order to survive and evolve to become what we are today, these animals needed to gain some protection and advantage over the ocean's predators, which were then dominated by crustaceans. /news/2023-07-fish-evolved-bony-scaly-armor.html Evolution Cell & Microbiology Mon, 17 Jul 2023 16:55:04 EDT news608831701 Traces of sex hormones extracted from a woolly mammoth's tusk provide the first direct evidence that adult males experienced musth, a testosterone-driven episode of heightened aggression against rival males, according to a new University of Michigan-led study. /news/2023-05-tusk-analysis-techniques-reveal-surging-testosterone.html Plants & Animals Paleontology & Fossils Wed, 03 May 2023 11:00:01 EDT news602327651 A new study, led by a researcher from the Centre for Oral, Clinical & Translational Sciences at King's College London, has identified key differences in tooth replacement between snakes and other reptiles, and identified the mechanism that allows snakes to shed their old teeth. /news/2023-02-unique-snakes-teeth.html Plants & Animals Evolution Fri, 17 Feb 2023 10:11:48 EST news595851106 Living sharks are often portrayed as the apex predators of the marine realm. Paleontologists have been able to identify fossils of their extinct ancestors that date back hundreds of millions of years to a time known as the Palaeozoic period. These early "sharks," known as acanthodians, bristled with spines. In contrast to modern sharks, they developed bony "armor" around their paired fins. /news/2022-09-ancient-shark-china-humans-oldest.html Evolution Paleontology & Fossils Wed, 28 Sep 2022 11:00:05 EDT news583578949 You only get 52 teeth in your lifetime: 20 baby teeth, followed by 32 adult teeth. /news/2022-09-humans-teeth-marsupials-rewriting-story.html Evolution Thu, 22 Sep 2022 10:20:01 EDT news583059461 For the first time, researchers successfully captured CT images of an entire wooly mammoth tusk, according to a new "Images in Radiology" article published in the journal Radiology. Researchers were able to do a full scan of the tusk in its entirety—or in toto—using a newer clinical CT scanner. The new technology allows for large-scale imaging without having to do multiple partial scans. /news/2022-08-ct-scanner-captures-entire-wooly.html Biotechnology Paleontology & Fossils Tue, 09 Aug 2022 14:33:22 EDT news579274398 Fossil tooth analysis by Southern Cross University geochemist Dr. Renaud Joannes-Boyau has played a central role in an international collaboration that has properly identified the earliest humans. /news/2022-07-fossil-tooth-analysis-earliest-humans.html Archaeology Thu, 14 Jul 2022 08:32:03 EDT news577006321