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للمرة الأولى في التاريخ.. اكتشاف آثار دم ديناصور عمرها 115 مليون سنة

By الجزيرة - اقتصاد · 2 hours ago · 1 min read الجزيرة - اقتصاد ↗

للمرة الأولى في التاريخ.. اكتشاف آثار دم ديناصور عمرها 115 مليون سنة

ما يعرفه ريفو عن الخبر

اكتشف باحثون لأول مرة آثار دم متحجرة داخل عظمة ساق ديناصور في البرازيل تعود لـ 115 مليون سنة.
أظهرت التحليلات الكيميائية وجود مادة الهيم داخل أجسام بيضاوية صغيرة تقع في القنوات التي كانت تحمل الأوعية الدموية.
ساهمت ظروف الدفن في بيئة فقيرة بالأكسجين ووجود معدن غني بالمنغنيز في الحفاظ على بقايا الخلايا لفترة طويلة.
تعد هذه النتائج أقوى الأدلة حتى الآن على حفظ بقايا خلايا دم حمراء داخل حفريات الفقاريات.

كشفت دراسة جديدة أن عظام ديناصور في البرازيل احتفظت ببقايا دم عمرها 115 مليون سنة. رصد باحثون خلايا حمراء متحجرة، وجزيئات من الهيم ، المكون المسؤول عن حمل الأكسجين في الدم.

المصدر: الجزيرة – اقتصاد

#البرازيل #ديناصورات

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