Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
핵우주 연대학은 우주의 나이를 측정하는 데 사용됩니다.haek-uju yeondae-hak-eun uju-ui nai-reul cheugjeonghaneun de sayongdoemnida.Nucleocosmochronology is used to measure the age of the universe.