Tag Archive for 'Human'

Drummond-Clarke et al. show that trees were an essential component of the hominin adaptive niche, with bipedalism evolving in an arboreal context, likely driven by foraging strategy. Illustration by Arturo Asensio, via Quo.es.

New Research Challenges Assumption that Ancestral Primates were Solitary

Jan 3, 2024 by News Staff

Was the ancestor of all primates a solitary-living species? Did more social forms of primate societies evolve from this basic and simple society? Until...

DeSilva et al. suggest that patterns of human brain evolution were influenced by collective intelligence, a convergent characteristic of diverse group-living animals. Image credit: Gerd Altmann.

Scientists Identify Mechanism that Governs Interaction between Perceptual and Memory Neural Systems

Jan 2, 2024 by News Staff

The classic understanding of brain organization is that perceptual regions of the brain represent the world ‘as it is,’ with the brain’s visual cortex...

The colored plots illustrate neural activity recorded in mouse visual cortex (V1); each row of tick marks represents the spikes of a different neuron; researchers can predict the target side from the neural activity with near perfect accuracy, animal subjects get many masked trials wrong due to how brain regions downstream of V1 process this information. Image credit: Gale et al.

New Animal Study Sheds Light on ‘Visual Masking’ Phenomenon

Dec 28, 2023 by News Staff

A strange phenomenon called visual masking can reveal the timescale of perception, but the underlying mechanisms are not well understood. The colored plots...

The study sheds new light on the link between sleep deprivation and obesity. Image credit: Sweet Briar College.

Inadequate Sleep Impacts Our Daytime Emotional Lives, New Review Says

Dec 27, 2023 by News Staff

In a largely sleep-deprived society, quantifying the effects of sleep loss on emotion is critical for promoting psychological health. In a new systematic...

Map of Sahul showing the extent of the now-submerged continental shelf (dark gray), with the area of the Northwest Shelf demarcated by a dashed black box, and the present-day distribution of the Köppen climate groups (seasonal precipitation and temperature) showing the extent of modern-day Australia and New Guinea. The tropical distribution of Late Pleistocene sites containing early axe technology are shown as black circles, sites without early axe technology as gray circles, and sites demonstrating Late Pleistocene occupation of the now submerged continental shelves as white circles. Image credit: Peter Hiscock / Norman et al., doi: 10.1016/j.quascirev.2023.108418.

Up To Half Million People Once Lived on Now-Submerged Northwest Shelf of Sahul

Dec 20, 2023 by News Staff

The new-submerged Northwest Shelf of Sahul — the combined landmass of Australia and New Guinea at times of lower sea level — was a vast area...

Human colonization and associated bird extinctions: human expansion across the planet is classified into four major waves; major human dispersal routes are indicated with arrows, and silhouettes show example fossil (pre-Holocene - 1500 CE) and observed (1500 CE - present) bird extinctions. Image credit: Cooke et al., doi: 10.1038/s41467-023-43445-2.

Humans May Have Led to Extinction of At Least 1,300 Bird Species since Pleistocene: Study

Dec 20, 2023 by News Staff

Birds are among the best-studied animal groups, but their prehistoric diversity is poorly known due to low fossilization potential. Hence, while many human-driven...

The human genome contains approximately half a million copies of LINE-1. Image credit: Baldwin et al., doi: 10.1038/s41586-023-06947-z.

Scientists Reveal Structure of Ancient Virus-Like Genetic Element

Dec 18, 2023 by News Staff

The Long Interspersed Element-1 (LINE-1) retrotransposon is an ‘ancient genetic parasite’ that has written around one third of the human genome through...

Velazquez-Arcelay et al. found that genetic material from Neanderthal ancestors may have contributed to the propensity of some people today to be early risers, the sort of people who are more comfortable getting up and going to bed earlier. Image credit: Holger Neumann / Neanderthal Museum.

Neanderthals Were Early Risers, New Research Suggests

Dec 14, 2023 by News Staff

When the ancestors of modern Eurasians migrated out of Africa and interbred with Eurasian archaic hominins, namely Neanderthals and Denisovans, DNA of...

The humpback whale (Megaptera novaeangliae).

SETI Scientists Test Interactive Bioacoustic Playback as Tool for Exploring Non-Human Intelligence

Dec 13, 2023 by News Staff

The Whale-SETI team, which includes researchers from the SETI Institute, University of California Davis and the Alaska Whale Foundation, has been studying...

Hoekstra et al. analyzed the instantaneous flight response of birds across habitats and distances to the synchronized discharging of fireworks throughout the Netherlands on New Year’s Eve. Image credit: Nick.

Fireworks on New Year’s Eve Trigger Strong Flight Responses in Bird Communities, Study Says

Dec 12, 2023 by News Staff

Fireworks are important elements of celebrations globally, but little is known about their effects on wildlife. In new research, scientists at the University...

Astronaut David R. Scott, commander, gives a military salute while standing beside the deployed United States flag during the Apollo 15 lunar surface extravehicular activity (EVA) at the Hadley-Apennine landing site. The flag was deployed toward the end of EVA-2. The Lunar Module, ‘Falcon,’ is partially visible on the right. Hadley Delta in the background rises approximately 4,000 m (about 13,124 feet) above the plain. The base of the mountain is approximately 5 km (about three statue miles) away. This photograph was taken by astronaut James B. Irwin, lunar module pilot. While astronauts Scott and Irwin descended in the Lunar Module to explore the Moon, astronaut Alfred M. Worden, command module pilot, remained in lunar orbit in the Command and Service Modules. Image credit: NASA / JSC.

Lunar Anthropocene: Are We in New Epoch of Moon’s History?

Dec 11, 2023 by Natali Anderson

In a paper published in the journal Nature Geoscience, Kansas Geological Survey researcher Justin Holcomb and his colleagues argue the new epoch may have...

Spottiswoode & Wood show experimentally that honeyguides in Tanzania and Mozambique discriminate among honey hunters’ calls, responding more readily to local than to foreign calls. Image credit: Brian Wood.

Honeyguide Birds Can Recognize Distinct Vocal Signals to Help People Locate Beehives: Study

Dec 8, 2023 by Natali Anderson

Greater honeyguides (Indicator indicator), a species of African bird, are well known to guide other species to beehives. They have even been known to work...

Global distribution of MSIs across 9,179 language varieties from the ASJP database. Color of dots represents the MSI of the language, with redder dots indicating higher and bluer dots indicating lower indices. The fill color of land areas represents the mean annual temperature. Image credit: Wang et al., doi: 10.1093/pnasnexus/pgad384.

Climate Plays Role in Shaping Evolution of Human Languages, New Study Reveals

Dec 5, 2023 by Enrico de Lazaro

Sounds of human languages can be affected by various factors of the natural environment. One such factor is the mean annual temperature. In new research,...

Castor sp. from the Viviparous Quadrupeds of North America by John Woodhouse Audubon.

Hominins Hunted Beavers At Least 400,000 Years Ago, Ancient Bones Reveal

Nov 29, 2023 by Enrico de Lazaro

Archaeologists from the Johannes Gutenberg University Mainz, the Leibniz Zentrum für Archäologie and Leiden University say they have found cut marks...

Bear skins have high insulating properties and might have played a role in the adaptations of Middle Pleistocene hominins, such as Homo heidelbergensis depicted here, to the cold and harsh winter conditions of Northwestern Europe. Image credit: Benoît Clarys.

Middle Paleolithic Human Diet was More Diverse than Previously Thought

Nov 28, 2023 by News Staff

Archaeologists from the Senckenberg Centre for Human Evolution and Palaeoenvironment at the University of Tübingen have analyzed the ancient animal remains...

Lovich et al. show that eye movement-related eardrum oscillations contain parametric information about horizontal and vertical eye displacement as well as initial/final eye position with respect to the head. Image credit: Lovich et al., doi: 10.1073/pnas.2303562120.

Eye Movements Can Be Decoded by Sounds They Generate in Ears, Study Shows

Nov 27, 2023 by News Staff

New research shows that the small sounds generated within the ear by the brain contain accurate information about contemporaneous eye movements in the...

Itch is an unpleasant sensation that evokes a desire to scratch. The skin barrier is constantly exposed to microbes and their products. However, the role of microbes in itch generation is unknown. Deng et al. show that Staphylococcus aureus, a bacterial pathogen associated with itchy skin diseases, directly activates pruriceptor sensory neurons to drive itch. Image credit: Deng et al., doi: 10.1016/j.cell.2023.10.019.

Common Skin Bacterium Can Cause Itch and Scratch-Induced Skin Damage, Study Says

Nov 23, 2023 by News Staff

New research by Harvard Medical School scientists shows that a common skin bacterium called Staphylococcus aureus causes itch by instigating a molecular...

Mendieta et al. used fMRI to measure brain activity in fans of rival soccer teams during match play. This image shows the contrast of winning and losing in the ‘good fanatic brain.’ It shows in warm colors the activity related to a significant victory. The blue scale represents the activation related to a significant loss; this pattern is congruent with the Mentalization Network, which suggests a rationalization process of the pain evoked by the losing scenario. Image credit: Mendieta et al.

Neuroscientists Use Brain Scans of Soccer Fans to Study Fanaticism

Nov 22, 2023 by News Staff

Soccer is an excellent social affiliation model, promoting inclusivity, teamwork, community spirit, social change, and personal achievement. Still, the...

The facial reconstruction of the La Chapelle-aux-Saints Neanderthal. Image credit: Moraes et al.

Scientists Reconstruct Face of La Chapelle-aux-Saints Neanderthal

Nov 21, 2023 by Enrico de Lazaro

Paleoanthropologists have reconstructed the face of a Neanderthal man whose 56,000-year-old remains were found at La Chapelle-aux-Saints in south-central...

Fernandez-Velasco et al. show that left-handedness is not associated with either a benefit or a deficit in spatial ability. Image credit: Adrian.

Left-Handedness is Not Linked to Better Spatial Skills: Study

Nov 10, 2023 by News Staff

There is an active debate concerning the association of handedness and spatial ability. Past studies used small sample sizes. Determining the effect of...

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