ডাইনোসর জন্মের আগে পৃথিবী কেমন ছিল How was earth before dinosaurs birth?

Описание: ডাইনোসর জন্মের আগে পৃথিবী কেমন ছিল, কিভাবে প্রাগৌতিহাসিক যুগের শুরু এবং শেষ হয়। সমুদ্র জীবন কিভাবে তৈরি এবং ধংস হয়?

How was earth before dinosaurs birth, how did the prehistoric era begin and end. How sea life is created and destroyed?

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