عالم روسي رفض جائزة بمليون دولار: ملحمة حدسية بوانكاريه!
أثار إثبات عالم الرياضيات الروسي غريغوري بيرلمان في عام 2002
Science
Erdogan says developed countries must do more to finance climate change measures
Turkish President Tayyip Erdogan emphasized the need for developed countries to take greater financial responsibility in combating climate change at the COP31 summit.
Science
UAE sends high-level delegation to Cop31 climate summit in Turkey | The National
Ruler of Ras Al Khaimah to represent President Sheikh Mohamed at two-day Leaders' Summit