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Enamel proteins link six Chinese H. erectus to Denisovan gene flow
science15 days ago

Enamel proteins link six Chinese H. erectus to Denisovan gene flow

Ancient enamel proteomics recovered endogenous proteins from six Middle Pleistocene Homo erectus teeth across northern and southern China (~0.4 Ma) and a Denisovan tooth. The study identifies two AMBN variants: a novel AMBN A253G found in all six H. erectus samples and not in other hominins, and AMBN M273V shared with Denisovans, suggesting Denisovans may have inherited this region from an H. erectus–related population. The results imply interactions between East Asian H. erectus populations and Denisovans and support the idea that H. erectus contributed to Denisovan DNA, with some signals ultimately reaching modern humans via introgression. Phylogenetic analyses cluster the H. erectus samples together, illustrating the power of enamel proteomics to illuminate deep human evolution and population diversity in East Asia.

via Nature|
#denisovans#east-asia#homo-erectus
NK Fires Ballistic Missiles as Kim Pushes Nuclear Expansion
world1 month ago

NK Fires Ballistic Missiles as Kim Pushes Nuclear Expansion

North Korea launched several ballistic missiles toward the sea from the Sinpo area, prompting heightened surveillance and an emergency meeting of South Korea's National Security Council, with Japan protesting and the United States tracking the launches; the moves follow Kim Jong Un’s recent vow to accelerate the country’s “limitless expansion” of its nuclear forces and come amid broader sanctions-related tensions.

via NBC News|
#ballistic-missiles#east-asia#international-security
China as a crossroad reshapes the early Homo story with new lineages
science3 months ago

China as a crossroad reshapes the early Homo story with new lineages

New fossils and analyses from China indicate eastern Asia played a central role in Homo evolution over the past 2 million years, with Denisovan-related fossils reclassified as Homo juluensis and Homo longi, and Yunxian 2 suggesting an early Homo sapiens divergence; China is portrayed as a dynamic crossroad where multiple Homo lineages interacted and admixed, shaping a diverse regional mosaic.

via Nature|
#denisovans#east-asia#homo-juluensis
East Asian Air Pollution Reductions May Have Accelerated Global Warming
science10 months ago

East Asian Air Pollution Reductions May Have Accelerated Global Warming

A new study suggests that the recent acceleration in global warming is partly due to the reduction of air pollution in East Asia, especially China, which had been masking the full extent of human-induced warming. The cleanup of pollutants like sulfur dioxide has removed a cooling effect, revealing more of the greenhouse gases' impact and causing faster surface warming. This artificial cooling effect, which has been in place for decades, is now diminishing as air quality improves, leading to an increase in observed global temperatures.

via The Conversation|
#air-pollution#climate-change#east-asia
science1 year ago

New Human Species with Large Heads Discovered in China

Scientists have discovered a new human species, Homo juluensis, in northeastern China, dating back 300,000 years. This species is characterized by larger skulls and teeth compared to Neanderthals and Homo sapiens, with brain volumes reaching up to 1,800 cubic centimeters. Despite their large brains, it's unclear if they were more intelligent. The discovery highlights the complexity of human evolution in East Asia, with potential links to Denisovans. Homo juluensis used stone tools, hunted in groups, and may have declined due to climatic changes and integration with modern humans.

via The Jerusalem Post|
#denisovans#east-asia#fossil-discovery