Peer-reviewed Articles - Biology

563 downloads
2,032 views

Background Facial expressions convey key cues of human emotions, and may also be important for interspecies interactions. The universality hypothesis suggests that six basic emotions (anger, disgust, fear, happiness, sadness, and surprise) should be expressed by...

["Animal Behavior","Anthropology","Zoology","Psychiatry and Psychology","Public Health"]
doi:10.7717/peerj.3413
76 downloads
599 views

Background The study of ancient microorganisms in mineralized dental plaque or calculi is providing insights into microbial evolution, as well as lifestyles and disease states of extinct cultures; yet, little is still known about the oral microbial community structure...

["Anthropology","Microbiology"]
doi:10.7717/peerj.3277
70 downloads
327 views

Background The Eocene was the warmest epoch of the Cenozoic and recorded the appearance of several orders of modern mammals, including the first occurrence of Euprimates. During the Eocene, Euprimates were mainly represented by two groups, adapiforms and omomyiforms,...

["Anthropology","Biodiversity","Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.3239
90 downloads
912 views

Background The experience of ‘sensed presence’—a feeling or sense that another entity, individual or being is present despite no clear sensory or perceptual evidence—is known to occur in the general population, appears more frequently in religious or spiritual...

["Anthropology","Neuroscience","Psychiatry and Psychology"]
doi:10.7717/peerj.3149
212 downloads
778 views

Background Manual anthropometric measurements are time-consuming and challenging to perform within acceptable intra- and inter-individual error margins in large studies. Three-dimensional (3D) laser body scanners provide a fast and precise alternative: within a...

["Anthropology","Anatomy and Physiology","Epidemiology","Public Health","Radiology and Medical Imaging"]
doi:10.7717/peerj.2980
76 downloads
446 views

Background Demonstrating the impact that parents have on the fitness of their children is a crucial step towards understanding how parental investment has affected human evolution. Parents not only transfer genes to their children, they also influence their environments....

["Anthropology","Ecology","Evolutionary Studies","Genetics","Public Health"]
doi:10.7717/peerj.2904
2 citations
247 downloads
1,131 views

Background Premastication, the transfer of pre-chewed food, is a common infant and young child feeding practice among the Tsimane, forager-horticulturalists living in the Bolivian Amazon. Research conducted primarily with Western populations has shown that infants...

["Anthropology","Microbiology"]
doi:10.7717/peerj.2660
1 citation
191 downloads
853 views

Altruism toward strangers is considered a defining feature of humans. However, manifestation of this behaviour is contingent on the costliness of the selfless act. The extent of altruistic tendencies also varies cross-culturally, being more common in societies...

["Animal Behavior","Anthropology"]
doi:10.7717/peerj.2610
533 downloads
1,725 views

Psychoactive plants contain chemicals that presumably evolved as allelochemicals but target certain neuronal receptors when consumed by humans, altering perception, emotion and cognition. These plants have been used since ancient times as medicines and in the context...

["Anthropology","Biodiversity","Evolutionary Studies","Neuroscience","Plant Science"]
doi:10.7717/peerj.2546
130 downloads
682 views

When exposed to enhanced background noise, humans avoid signal masking by increasing the amplitude of the voice, a phenomenon termed the Lombard effect. This auditory feedback-mediated voice control has also been found in monkeys, bats, cetaceans, fish and some...

["Animal Behavior","Anthropology","Evolutionary Studies"]
doi:10.7717/peerj.2328
1 citation
481 downloads
2,222 views

The evolution of the modern human (Homo sapiens) cranium is characterized by a reduction in the size of the feeding system, including reductions in the size of the facial skeleton, postcanine teeth, and the muscles involved in biting and chewing. The conventional...

["Anthropology","Computational Biology","Evolutionary Studies","Anatomy and Physiology"]
doi:10.7717/peerj.2242
2 citations
451 downloads
4,082 views

Haasgat is a primate-rich fossil locality in the northeastern part of the Fossil Hominid Sites of South Africa UNESCO World Heritage Site. Here we report the first hominin identified from Haasgat, a partial maxillary molar (HGT 500), that was recovered from an...

["Anthropology","Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.2024
164 downloads
909 views

The phylogenetic position of many fossil platyrrhines with respect to extant ones is not yet clear. Two main hypotheses have been proposed: the layered or successive radiations hypothesis suggests that Patagonian fossils are Middle Miocene stem platyrrhines lacking...

["Anthropology","Biodiversity","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.1967
361 downloads
1,131 views

Indigenous beers (chicha) are part of the indigenous culture in Ecuador. The fermentation process of these beers probably relies on microorganisms from fermented substrates, environment and human microbiota. We analyzed the microbiota of artisanal beers (including...

["Anthropology","Food Science and Technology","Microbiology","Infectious Diseases"]
doi:10.7717/peerj.1962
1 citation
307 downloads
1,617 views

The Drimolen Palaeocave System Main Quarry deposits (DMQ) are some of the most prolific hominin and primate-bearing deposits in the Fossil Hominids of South Africa UNESCO World Heritage Site. Discovered in the 1990s, excavations into the DMQ have yielded a demographically...

["Anthropology","Paleontology"]
doi:10.7717/peerj.1941

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