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وزير دفاع باكستان يصف إسرائيل بأنها "لعنة على الإنسانية" في منشور محذوف"شعرنا بالموت": الناجون يروون مذبحة إسرائيل في بيروتتوفي رائد الهيب هوب أفريكا بامباتا عن عمر يناهز 68 عامًاالهجوم على خط أنابيب النفط السعودي أدى إلى فقدان 10 بالمئة من قدرة المملكة على تصدير النفطزعيم ألماني يقول إنه لا يريد لحلف الناتو أن "ينقسم" بسبب الحرب على إيرانيقول العلماء إن أقدم حفرية أخطبوط في العالم ليست أخطبوطا بعد كل شيءضابط سابق في شرطة نيويورك يُحكم عليه بالسجن من 3 إلى 9 سنوات بسبب رميه مبرد تسبب في حادث مميتإسرائيل تستهدف مراسل الجزيرة في غزة بعد حملة تحريضهاكرز يحصلون على ما لا يقل عن 19,000 ملف من هاتف رئيس الأركان الإسرائيلي السابق هاليفيهؤلاء الإيرانيون دعموا الحرب الأمريكية الإسرائيلية. والآن يدركون خطأهم
وزير دفاع باكستان يصف إسرائيل بأنها "لعنة على الإنسانية" في منشور محذوف"شعرنا بالموت": الناجون يروون مذبحة إسرائيل في بيروتتوفي رائد الهيب هوب أفريكا بامباتا عن عمر يناهز 68 عامًاالهجوم على خط أنابيب النفط السعودي أدى إلى فقدان 10 بالمئة من قدرة المملكة على تصدير النفطزعيم ألماني يقول إنه لا يريد لحلف الناتو أن "ينقسم" بسبب الحرب على إيرانيقول العلماء إن أقدم حفرية أخطبوط في العالم ليست أخطبوطا بعد كل شيءضابط سابق في شرطة نيويورك يُحكم عليه بالسجن من 3 إلى 9 سنوات بسبب رميه مبرد تسبب في حادث مميتإسرائيل تستهدف مراسل الجزيرة في غزة بعد حملة تحريضهاكرز يحصلون على ما لا يقل عن 19,000 ملف من هاتف رئيس الأركان الإسرائيلي السابق هاليفيهؤلاء الإيرانيون دعموا الحرب الأمريكية الإسرائيلية. والآن يدركون خطأهم
العودة لصفحة الأخبار
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
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: تواليت أرتيميس2 المخصص للرحلات القمرية يعمل مجددًا لراحة رواد الفضاء بعد إصلاحه في الليل

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: رواد الفضاء في مهمة أرتميس الثانية متجهون نحو القمر بعد انطلاقهم في أول رحلة قمرية لناسا منذ عقود

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: أقدم تسجيل معروف للحوت قد يكشف أسرار المحيط

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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تظهر الصورة بويضة بشرية تم تعديلها جينيًا باستخدام خلايا جلدية، مما يعكس جهود العلماء في تخليق بويضات قابلة للتخصيب.

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

في خطوة ثورية نحو تحقيق حلم الإنجاب، استخدم علماء من أوريغون خلايا جلدية لتخليق بويضات قابلة للتخصيب، لكنهم واجهوا تحديات تتعلق بالتشوهات الكروموسومية. هل ستنجح هذه الأبحاث في تغيير مستقبل العقم؟ تابعوا معنا لمعرفة المزيد عن هذه التقنية المبتكرة!
علوم
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صاروخ ينطلق إلى الفضاء من كيب كانافيرال، مشكلاً عموداً من الدخان والهباء، في إطار إطلاق قمر صناعي لرصد الأرض.

قمر صناعي راداري أطلقته الهند وناسا سيتتبع التغيرات الدقيقة في اليابسة والجليد على الأرض

في خطوة غير مسبوقة، أطلقت وكالة ناسا والهند قمرًا صناعيًا جديدًا لرسم خرائط الأرض، قادرًا على تتبع التغيرات الدقيقة في البيئة. هذه المهمة الطموحة التي تبلغ تكلفتها 1.3 مليار دولار ستحدث ثورة في كيفية توقع الكوارث الطبيعية. تابعونا لمعرفة المزيد عن هذا الإنجاز العلمي المذهل!
علوم
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عودة كبسولة فضائية من محطة الفضاء الدولية إلى الأرض، مع عرض بيانات السرعة والارتفاع، في سياق مهمة خاصة مع سبيس إكس.

رواد فضاء من الهند وبولندا والمجر يعودون إلى الأرض بعد مهمة في محطة فضائية خاصة

في لحظة تاريخية، عاد رواد الفضاء من الهند وبولندا والمجر إلى الأرض بعد مهمة مدهشة إلى محطة الفضاء الدولية، حيث أجروا تجارب فريدة وشاركوا في تجارب فضائية غير مسبوقة. استعدوا لاكتشاف كيف تفتح هذه الرحلة آفاقًا جديدة لدولهم. تابعوا القصة الكاملة!
علوم
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كوكب شبيه بتاتوين يدور حول قزمين بنيين في الفضاء، يظهر في الصورة مع نجمين فاشلين في الخلفية، مما يعكس مداراً غير اعتيادي.

يقول العلماء: كوكب شبيه بتاتوين خارج النظام الشمسي قد يدور حول نجمين فاشلين.

اكتشاف كوكب جديد شبيه بكوكب تاتوين يثير حماس العلماء، حيث يدور حول نجمين فاشلين في مدار غريب. هل يمكن أن تكشف هذه الأجرام السماوية عن أسرار جديدة حول كواكب خارج نظامنا الشمسي؟ تابعوا القراءة لتعرفوا المزيد عن هذا الاكتشاف المذهل!
علوم
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