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تسعى بي بي سي لرفض دعوى تشهير ترامب بقيمة 10 مليارات دولار في محكمة فلوريداأبل تطلب من جوجل المساعدة في تحسين سيري وإضافة ميزات ذكاء اصطناعي أخرى إلى الآيفوننواب أمريكيون يزورون الدنمارك في ظل استمرار تهديدات ترامب لجرينلاندمنظمة ترامب ومطور سعودي يعلنان عن مشاريع بقيمة 10 مليارات دولارالمملكة المتحدة تدفع لمعتقل غوانتانامو أبو زبيدة مبلغًا "كبيرًا" بسبب التواطؤ في التعذيبكيف ترى تركيا الاحتجاجات في إيرانالصومال يلغي جميع الاتفاقيات مع الإمارات، بما في ذلك في الموانئ الكبرىوفاة ثلاثة أطفال فلسطينيين بسبب البرد في غزة وسط الحصار الإسرائيليارتفعت أعمال العنف من المستوطنين الإسرائيليين في الضفة الغربية بنسبة 25 في المئةأكاديميون ومفكرون يوقعون رسالة دعمًا لسجناء حركة فلسطين أكشن
تسعى بي بي سي لرفض دعوى تشهير ترامب بقيمة 10 مليارات دولار في محكمة فلوريداأبل تطلب من جوجل المساعدة في تحسين سيري وإضافة ميزات ذكاء اصطناعي أخرى إلى الآيفوننواب أمريكيون يزورون الدنمارك في ظل استمرار تهديدات ترامب لجرينلاندمنظمة ترامب ومطور سعودي يعلنان عن مشاريع بقيمة 10 مليارات دولارالمملكة المتحدة تدفع لمعتقل غوانتانامو أبو زبيدة مبلغًا "كبيرًا" بسبب التواطؤ في التعذيبكيف ترى تركيا الاحتجاجات في إيرانالصومال يلغي جميع الاتفاقيات مع الإمارات، بما في ذلك في الموانئ الكبرىوفاة ثلاثة أطفال فلسطينيين بسبب البرد في غزة وسط الحصار الإسرائيليارتفعت أعمال العنف من المستوطنين الإسرائيليين في الضفة الغربية بنسبة 25 في المئةأكاديميون ومفكرون يوقعون رسالة دعمًا لسجناء حركة فلسطين أكشن
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علوم

مومياوات الديناصورات تكشف أسرار ما قبل التاريخ

اكتشف العلماء مومياوات ديناصورات مذهلة في وايومنغ، تشمل أول مومياء لصغير ديناصور محنط. هذه الاكتشافات تكشف عن تفاصيل جديدة حول شكل الديناصورات وكيفية تحنيطها، مما يفتح آفاقًا جديدة لفهم عصور ما قبل التاريخ.

مومياوات ديناصورات محفوظة بشكل غير تقليدي في بيئة مائية، تظهر تفاصيل جلدها وحراشفها على طبقة رقيقة من الطين.
تظهر هذه الرسمة التي قدمتها جامعة شيكاغو كيف كان قد يبدو ديناصور ذو منقار بطة استنادًا إلى بقايا محنطة تم العثور عليها في وايومنغ.
مومياء ديناصور محفوظة بشكل غير عادي تظهر تفاصيل جلدها وحراشفها على طبقة طينية، مما يوفر رؤى جديدة حول مخلوقات ما قبل التاريخ.
تظهر هذه الصورة المقدمة من جامعة شيكاغو مومياء لديناصور ذو منقار بط resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting 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resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting resting
مومياء ديناصور محفوظة تظهر انطباعات جلدية وحراشف على طبقة من الطين، مع يد إنسان تلامس البقايا، توضح تفاصيل التحنيط الفريد.
تظهر هذه الصورة التي قدمتها جامعة شيكاغو جلد ديناصور مومى صغير ذو قشور تم العثور عليه في وايومنغ. (تايلر كيلور/جامعة شيكاغو عبر أسوشيتد برس)
بقايا مومياء ديناصور منقار البط محفوظة في طبقة رقيقة من الطين، تظهر انطباعات جلدية وحراشف، مما يقدم رؤى جديدة عن شكل الديناصورات.
تظهر هذه الصورة المقدمة من جامعة شيكاغو انطباعات لقدم ديناصور محنط. (تايلر كيلور/جامعة شيكاغو عبر أسوشيتد برس)
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مقدمة حول مومياوات الديناصورات

اكتشف باحثون زوجًا مخيفًا من مومياوات الديناصورات التي يبدو أنها حُفظت بطريقة غير متوقعة.

أنواع مومياوات الديناصورات

تختلف رفات الديناصورات هذه عن المومياوات الملفوفة في مصر أو المومياوات البشرية الطبيعية التي يتم حفظها بالصدفة في المستنقعات أو الصحاري. فالديناصورات المحنطة قديمة جدًا لدرجة أن جلدها وأنسجتها الرخوة تحجرت. ويستخدم العلماء هذه البقايا النادرة، إلى جانب عظام الديناصورات، لإعادة تكوين الشكل الذي ربما كان يبدو عليه شكل هذه المخلوقات التي تعود إلى عصور ما قبل التاريخ.

المومياوات المحنطة القديمة

ظل العلماء يكتشفون مومياوات الديناصورات لأكثر من قرن من الزمان. دُفن بعضها بسرعة بعد موتها، بينما غرق بعضها الآخر في المسطحات المائية أو جفّت.

مومياء ديناصور بمنقار البط

شاهد ايضاً: العلماء يلتقطون أصوات طقطقة يعتقدون أنها صاعقة برق على المريخ

وينحدر العديد منها، بما في ذلك مومياء ديناصور بمنقار البط اكتشفت في عام 1908، من منطقة في شرق وايومنغ. في الدراسة الجديدة، عاد العلماء إلى ما يسمى بمنطقة المومياء هذه وعثروا على بقايا جديدة، بما في ذلك مومياء ديناصور منقار البط الذي كان عمره بضع سنوات فقط عندما مات.

طرق التحنيط الغير تقليدية

وقال بول سيرينو، عالم الحفريات بجامعة شيكاغو الذي شارك في هذا الاكتشاف: "هذا هو أول صغار ديناصور محنط بالفعل".

التحنيط بواسطة الميكروبات

ومن المثير للدهشة أن المومياوات الجديدة يبدو أنها حُفظت دون أي دليل على وجود جلد متحجر. وبدلاً من ذلك، تركوا انطباعات لجلودهم وحراشفهم على طبقة رقيقة من الطين التي تصلبت بمساعدة الميكروبات.

أهمية اكتشاف مومياوات الديناصورات

شاهد ايضاً: المذنب بين النجوم يمر بالقرب من المريخ بينما يراقب أسطول من المركبات الفضائية

وقد حافظ هذا النمط من التحنيط على كائنات حية أخرى من قبل، لكن العلماء لم يعتقدوا أنه يمكن أن يحدث على اليابسة. وقال سيرينو إنه من المحتمل أن تكون المومياوات الأخرى التي عُثر عليها في موقع وايومنغ قد تكونت بطريقة مماثلة.

فوائد البحث عن مومياوات جديدة

واستخدم العلماء هذه القوالب الطينية لرسم صورة أوضح لما يمكن أن تكون عليه الديناصورات ذات منقار البط عندما كانت على قيد الحياة، بما في ذلك المسامير على ذيلها والحوافر على أقدامها. نُشرت النتائج الجديدة يوم الخميس في مجلة Science.

استنتاجات حول الديناصورات

يمكن أن يساعد فهم كيفية تشكل مومياوات الديناصورات العلماء في الكشف عن المزيد منها. قال ماتيوس فوسيك، عالم الحفريات بجامعة ميسيريكورديا الذي لم يشارك في هذا الاكتشاف، إنه من المهم البحث ليس فقط عن عظام الديناصورات، ولكن أيضًا عن آثار الجلد والأنسجة الرخوة التي قد لا يتم دراستها أو حتى التقاطها.

كنوز المعلومات من الحفريات

شاهد ايضاً: الباحثون يحولون خلايا الجلد البشرية إلى بويضات لكن ليست صالحة للاستخدام بعد

يقدم المزيد من المومياوات المزيد من الرؤى حول كيفية نمو هذه المخلوقات وعيشها.

وقالت ستيفاني درومهيلر، عالمة الحفريات الفقارية في جامعة تينيسي في نوكسفيل، التي لم تشارك في الدراسة: في كل مرة نعثر فيها على واحدة من هذه الحفريات، نجد كنزاً من المعلومات عن هذه الحيوانات.

أخبار ذات صلة

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شفق قطبي ملون يضيء السماء ليلاً مع silhouettes لأشخاص بالقرب من هيكل معدني، يعكس النشاط الشمسي المتزايد وتأثيره على الأرض.

قد تكون الأضواء الشمالية مرئية في بعض مناطق الولايات المتحدة بسبب العواصف الشمسية

استعدوا لمشاهدة عرض ضوئي مذهل في سماء الليل! العواصف الشمسية القادمة قد تجلب الشفق القطبي الملون إلى العديد من الولايات الأمريكية الشمالية، مما يجعلها فرصة لا تُفوَّت لعشاق الفلك. تابعوا معنا لمعرفة كيفية رصد هذه الظاهرة الرائعة!
علوم
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كبسولة سبيس إكس تقترب من محطة الفضاء الدولية، حيث تحمل طاقمًا جديدًا من رواد الفضاء الأمريكيين والروس واليابانيين.

سبيس إكس توصل أربعة رواد فضاء إلى محطة الفضاء الدولية بعد 15 ساعة فقط من الإطلاق

في رحلة مثيرة، نقلت سبيس إكس طاقمًا جديدًا إلى محطة الفضاء الدولية، حيث سيقضون ستة أشهر في تجربة علمية فريدة. انطلق رواد الفضاء من مركز كينيدي، ليشهدوا لحظات لا تُنسى في الفضاء. تابعوا معنا تفاصيل هذه الرحلة المدهشة!
علوم
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وصول مركبة فضائية من سبيس إكس إلى محطة الفضاء الدولية، مع عرض لمعدات المحطة في الخلفية، أثناء مهمة علمية دولية.

محطة الفضاء الدولية تستقبل أول رواد فضاء من الهند وبولندا والمجر

في لحظة تاريخية، هبط أول رواد فضاء من الهند وبولندا والمجر على محطة الفضاء الدولية، في رحلة مدهشة نظمتها شركة سبيس إكس. مع قائدة الطاقم الأمريكية بيجي ويتسون، يستعد الفريق لإجراء تجارب فريدة في الفضاء. انضموا إلينا لاستكشاف تفاصيل هذه المهمة الرائدة!
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إناث قردة البونوبو تحتضن بعضها البعض في الغابة، مما يعكس تعاونهن لحماية أنفسهن من الذكور وتعزيز مكانتهن الاجتماعية.

البونوبو في الكونغو يشكلون مجموعات من الفتيات للدفاع عن أنفسهن ضد العدوان الذكوري، وفقًا لدراسة

في عالم قردة البونوبو، تتجلى قوة الإناث من خلال التعاون، حيث تتحد لصد الذكور والدفاع عن مكانتهن الاجتماعية. هذه الديناميكية الفريدة تعكس كيف يمكن للتحالفات أن تعزز القوة في مملكة الحيوان. اكتشف المزيد عن هذه الظاهرة المثيرة وكيف تؤثر على سلوكياتنا البشرية.
علوم
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