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Ilmuwan Identifikasi Fosil Berusia 12.600 Tahun di Himalaya Imuwan mengidentifikasi fosil berupa bekas cetakan tangan di pegunungan Himalaya. Fosil tersebut didapatkan di sekitar candi Chusang di Tibet. Berdasar temuan cetakan tangan tersebut, ilmuwan memprediksi manusia sudah menempati dataran tinggi Tibet sejak 7.400 hingga 12.600 tahun yang lalu. Bahkan, mereka mulai menetap di dataran tersebut sejak 8.000 hingga 8.400 tahun yang lalu. Awalnya, para ilmuwan menduga penduduk mulai memadati dataran tinggi itu sejak 20.000 tahun yang lalu. "Temuan baru itu juga menunjukan penduduk akhirnya lebih senang menetap permanen ketimbang harus berpindah-pindah," kata arkeolog antropologi dari universitas Wyoming, Randy Haas seperti dikutip Science Alert, Jumat (20/1). Sebelumnya, untuk memperjelas temuan mereka, para ilmuwan menggunakan thorium dan uranium. Mereka juga melakukan radio karbon terhadap lingkungan sekitar bersama dengan teknik pendaran optik. Teknik tersebut membuat para peneliti mampu menentukan tanggal usia batuan sedimen di mana cetakan ditemukan.