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8,000-year-old rock carvings in Arabia may be world's oldest megastructure blueprints
Live Science via Yahoo News· 12 months agoHere we see a rectangular stone standing upright with carving on it in the middle of a desert. Stars...
National parks teach students about environmental issues in this course
The Conversation via Yahoo News· 2 months agoStudents are provided the opportunity to use America’s national parks as case studies for...