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Emas terbentuk jauh sebelum Bumi ada, melalui tabrakan dua bintang neutron di luar angkasa. Peristiwa ini disebut kilonova dan menghasilkan unsur-unsur berat seperti emas melalui proses penangkapan neutron cepat . Setelah itu, emas tersebar di ruang angkasa dan ikut terbawa ke Bumi saat meteorit yang mengandung logam berat menghantam permukaan Bumi sekitar 4,5 miliar tahun lalu. Karena emas adalah logam berat, sebagian besar tenggelam ke inti Bumi. Namun, aktivitas vulkanik dan perger...
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