पृथ्वी पर डायनासोर का खात्मा लगभग 6.5 करोड़ साल पहले पृथ्वी पर 10 किलोमीटर व्यास वाला छोटा तारा गिरने पर पृथ्वी पर डायनासोर का खात्मा हो गया था, अगर डायनासोर का खात्मा नहीं हुआ होता तो क्या होता? आज पृथ्वी पर जीवन केसा होता,अगर मन लो डायनासोर ख़त्म नहीं हुए ह…www.sciencethinks.com
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