أصل الحياة على كوكبنا.. نظرية عمرها قرن تواجه التشكيك
لطالما أثار نشوء الحياة على الأرض تساؤلات العلماء، ولا سيما ما يتعلق بمصدر المواد الأولية التي أسهمت في ظهورها.
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فيديو | شغف اكتشاف الأماكن البعيدة - Live Talk م٢ - الحلقة ١٤٧ | هذا اليوم
فيديو | شغف اكتشاف الأماكن البعيدة Live Talk م٢ الحلقة ١٤٧
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UN Reports Warn of Large-Scale Damage to Earth’s Ice from Climate Change
Exceeding 1.5C of global warming will have "irreversible" consequences for glaciers, sea ice and the Earth's frozen regions, two UN reports warned on Monday, calling for urgent action. The landmark 2015 Paris Agreement commits the world to limiting warming to well below 2C and pursuing efforts to hold it at 1.5C to try to avoid the worst effects of climate change. One of the reports said overshooting the 1.5C target "will bring large-scale and in many cases irreversible impacts" for the cryosphere -- Earth's ice in all its forms.
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Challenging Scientific Assumptions: Blood Remnants Found in 115-Million-Year-Old Dinosaur Bones
An international research team has discovered fossilized red blood cells, hemoglobin-derived biomolecules and amino acids from collagen protein inside the bones of a dinosaur that lived approximately 115 million years ago in Brazil. The unprecedented discovery opens new avenues for studying ancient life and challenges existing assumptions about how long fossils can preserve their biological components.