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Scientists uncover complex population changes after Japan's ancient volcanic eruption

Natural disasters reshape human societies and ecosystems.

A massive volcanic eruption in Japan 7,300 years ago had varied effects on human populations. Some communities declined, while others adapted and grew. Researchers found that migration, new social structures, and innovations in resource use helped survivors thrive. The study highlights the complexity of post-disaster recovery and its broader ecological impacts.

  • The Kikai-Akahoya eruption caused both population decline and unexpected growth in different regions of Japan.
  • Survivors in northern Kyushu adapted by relocating to coastal areas with recovering marine resources.
  • Population changes were observed even in regions far from the eruption site, suggesting widespread effects.
  • Researchers from Lund University and Cambridge University analyzed archaeological data to understand these demographic shifts.

Crocodiles survived asteroid impact due to climate preference

Divers and ocean readers may find interest in understanding how ancient ecosystems responded to mass extinctions.

New research suggests that crocodiles and their relatives survived the dinosaur extinction due to their long-term adaptation to warm climates. Scientists analyzed fossils and climate models to show that tropical regions remained habitable after the asteroid impact, offering refuges for crocodile species. This study highlights the role of climate in shaping survival during major environmental changes.

  • Researchers at UCL studied 7,000 fossils and climate models to explain crocodile survival.
  • Crocodile relatives expanded into warm regions, including Antarctica, during hot periods.
  • Tropical areas remained suitable for crocodiles after the asteroid impact, unlike many dinosaur habitats.
  • Adaptations allowed some crocodile relatives to survive extreme climate changes, like the Cretaceous Thermal Maximum.

75,000-year-old Neanderthal may have been killed by a spear aimed at the heart

This discovery provides rare insight into ancient violence and weapon use among Neanderthals.

A Neanderthal's shoulder blade, found in a cave in Iraqi Kurdistan, shows a circular hole likely caused by a wooden spear. The injury suggests a fatal attack, possibly targeting the heart. Researchers believe the spear entered from above, passing through the chest and shoulder, leading to rapid death. The bone's preservation offers clues about the weapon's design and the nature of the attack.

  • A 75,000-year-old Neanderthal scapula shows a 15mm circular hole likely from a wooden spear.
  • Researchers from the University of Cambridge suggest the spear entered the chest, passing through the lung and shoulder blade.
  • The beveled edges and bone fragments indicate the wound may have been an intentional 'heart shot'.
  • The discovery offers the first evidence of wooden spears used in the prehistoric Middle East.

Ancient wall in Morocco redefines North Africa's historical timeline

Divers and ocean enthusiasts will find this discovery significant for understanding ancient human interaction and environmental adaptation in the region.

A 4,000-year-old wall discovered in north-west Morocco challenges previous assumptions about the complexity of societies in the Maghreb. This structure, likely defensive in nature, suggests organized communities engaged in broader Mediterranean interactions. The site also shows continuity with medieval use, offering insights into long-term human settlement patterns in the area.

  • Researchers at Oued Beht uncovered a 4,000-year-old defensive wall in north-west Morocco, the earliest known large-scale construction in the region beyond the Nile Valley.
  • The wall, built during the Bronze Age, may have been designed to manage competition over land, resources, and movement control rather than defend against invaders.
  • Excavations at Oued Beht reveal a prehistoric hub with farming, craft production, and connections to Mediterranean networks, highlighting the region's historical significance.
  • The site shows reuse of the defensive structure in the medieval period, indicating long-term human adaptation and settlement continuity.

Ancient ape fossil in Egypt challenges human origins theories

This discovery may reshape understanding of where apes evolved, offering new insights for divers and ocean researchers.

A 18-million-year-old ape fossil found in Egypt suggests that the evolutionary roots of modern apes may lie in northern Africa rather than East Africa. The fossil, named Masripithecus moghraensis, was discovered in Wadi Moghra and provides new evidence about the geographic origins of apes. Researchers believe this find fills a gap in the ape evolutionary puzzle and highlights the importance of northern Africa in the development of the lineage leading to all living apes.

  • Masripithecus moghraensis, a new ape species, was found in northern Egypt's Wadi Moghra.
  • The fossil, dating to 17-18 million years ago, is the first definitive ape fossil discovered in North Africa.
  • Researchers from Mansoura University and the University of Southern California led the study published in Science.
  • The species' unique dental features suggest a diet of fruit with the ability to process harder foods.

Ancient DNA shows Ice Age Europeans were more connected

Divers and ocean enthusiasts may learn about ancient human migration and genetic exchange across Europe.

New genetic research reveals that Ice Age Europeans had more connections than previously believed. By analyzing ancient DNA from caves and remains, scientists found evidence of genetic mixing between distant populations. This challenges old ideas about isolation and shows how people interacted and shared genes across large areas of Europe.

  • Researchers from the University of Vienna analyzed ancient DNA to show Ice Age Europeans were more connected.
  • A woman from 30,000 years ago in France had genetic links to central and eastern Europe.
  • Cave sediments provided genetic data even without human remains, showing continuous ancestry in some regions.
  • A mother and son in southern Italy suggest mating patterns helped prevent inbreeding in ancient communities.