دراسة تربط استخدام اليد اليمنى لدى البشر بالمشي على قدمين وتطور حجم الدماغ

19 مايو، 2026

من إعداد الذكاء الاصطناعي

توصل باحثون في جامعة أكسفورد إلى أن المشي في وضع منتصب وزيادة حجم الدماغ كانا على الأرجح المحركين الرئيسيين لتفضيل استخدام اليد اليمنى لدى البشر المعاصرين. وتستند هذه النتائج إلى تحليل لأنواع الرئيسيات وأشباه البشر المنقرضة.

قام فريق بقيادة الدكتور توماس أ. بوشيل بفحص بيانات 2025 من القردة والقرود عبر 41 نوعاً. واستخدم الفريق نماذج بايزية لاختبار عوامل مثل حجم الدماغ ونسبة طول الذراع إلى طول الساق، وهو مؤشر على الحركة على قدمين. وبمجرد إدراج هذه السمات، لم يعد البشر يشكلون استثناءً تطورياً بين الرئيسيات.

Brain scans link larger striatum to psychopathic traits, study finds

10 مايو، 2026 من إعداد الذكاء الاصطناعي صورة مولدة بواسطة الذكاء الاصطناعي تم التحقق من الحقائق

MRI scans of 120 adults in the United States found that people with higher psychopathic traits had a striatum—an area involved in reward and motivation—that was about 10% larger on average than those with few or no such traits, according to a study in the Journal of Psychiatric Research.

Study suggests left-handed people are more competitive

A recent study indicates that left-handed individuals may have an edge in competitive situations, while right-handed people are better at cooperation. This finding challenges evolutionary expectations about handedness. Researchers explore why around 10 percent of humans remain left-handed despite potential survival disadvantages.

Bulgarian femur hints at early bipedal apes in Europe

9 مارس، 2026 من إعداد الذكاء الاصطناعي

Researchers have uncovered a 7.2-million-year-old femur in Bulgaria that shows features suggesting bipedal walking, predating known African hominin fossils. The find, linked to the ape species Graecopithecus freybergi, challenges the idea that upright walking evolved solely in Africa. However, experts caution that more evidence is needed to confirm bipedality.

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Neanderthal infants grew faster than modern human babies

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Fossil discovery in Ethiopia shows early human relatives coexisted

أوروبا

One-eyed ancestor behind human eyes

Monkeys control virtual worlds with brain implants

Three rhesus macaque monkeys equipped with brain-computer interfaces navigated virtual environments using only their thoughts. Researchers implanted around 300 electrodes in motor and premotor cortex areas to enable this control. The experiments aim to improve intuitive control for people with paralysis.

Ancient reptile shifted from four legs to two as it matured

24 أبريل، 2026 من إعداد الذكاء الاصطناعي

A newly described crocodile relative from the Late Triassic period began life walking on four legs before adopting a bipedal stance in adulthood, scientists say. The poodle-sized Sonselasuchus cedrus, unearthed in Arizona, reveals unusual growth patterns in ancient reptiles. Researchers detailed the findings in a study published this year.

DNA study supports human arrival in Australia 60,000 years ago

Scientists have found genetic evidence that modern humans reached New Guinea and Australia around 60,000 years ago, backing the long chronology over more recent estimates. The international team, led by researchers at the University of Huddersfield and the University of Southampton, analyzed nearly 2,500 mitochondrial DNA genomes from Aboriginal Australians, New Guineans, and Southeast Asian populations. Their work suggests early migrants used at least two routes through Southeast Asia.

Egyptian fossil ape challenges east Africa origins theory

28 مارس، 2026 من إعداد الذكاء الاصطناعي

A newly discovered fossil ape from northern Egypt, named Masripithecus moghraensis, dates to 17-18 million years ago and may be closely related to the ancestors of modern apes. Researchers argue this finding shifts the focus from East Africa to northern Africa for early ape evolution. The species provides key insights into hominoid diversity during a period of continental connections.

20 مايو 2026 22:29

دراسة تربط استخدام اليد اليمنى لدى البشر بالمشي على قدمين وتطور حجم الدماغ

مقالات ذات صلة

Brain scans link larger striatum to psychopathic traits, study finds

Study suggests left-handed people are more competitive

Bulgarian femur hints at early bipedal apes in Europe

Neanderthal infants grew faster than modern human babies

Fossil discovery in Ethiopia shows early human relatives coexisted

One-eyed ancestor behind human eyes

Monkeys control virtual worlds with brain implants

Ancient reptile shifted from four legs to two as it matured

DNA study supports human arrival in Australia 60,000 years ago

Egyptian fossil ape challenges east Africa origins theory

Rainforest discovery shows humans lived in Africa 150000 years ago

Study links T. rex tiny arms to powerful skull evolution

Southern Cape coastal hypothesis proposes new origin for Homo sapiens migration

Human skulls have become rounder over past century

New archaeology findings reaffirm Ethiopia as human cradle

Decline in megafauna linked to shift in ancient stone tools

Stroke prompts rejuvenation-like changes in undamaged brain areas

Study suggests difficult births for ancient Australopithecus

Study indicates male Neanderthals fathered most human-Neanderthal offspring

Study uncovers 40,000-year-old signs as early information systems

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