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US dollar56.03EGPEuro62.56EGPBritish pound75.00EGPSaudi riyal14.94EGPUAE dirham15.26EGPKuwaiti dinar180.24EGPJordanian dinar79.02EGPQatari riyal15.39EGPTurkish lira1.12EGPChinese yuan8.40EGPGold 246,982.75EGP/gGold 216,109.91EGP/gGold 185,237.06EGP/gSilver88.72EGP/g

Science

الطائر الطنان.. تصميم معجز يتحدى قوانين الفيزياء

By الجزيرة - اقتصاد · May 22, 2026 · 1 min read الجزيرة - اقتصاد ↗

الطائر الطنان.. تصميم معجز يتحدى قوانين الفيزياء

هذه الطيور الصغيرة لا تكتفي برفرفة أجنحتها، بل تمتلك قدرة استثنائية على التحليق الثابت كأنها طائرة هليكوبتر مصغرة، والانطلاق للأمام في أي اتجاه تقريبا خلال جزء من الثانية، بل والتراجع إلى الخلف.

المصدر: الجزيرة – اقتصاد

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