Scientists in Australia have set a new record by using the world's oldest known viable semen to impregnate dozens of merino sheep.
원문출처 : https://www.cnn.com/2019/03/18/australia/oldest-sperm-ewes-scli-scn-intl/index.html
원문출처 : https://www.cnn.com/2019/03/18/australia/oldest-sperm-ewes-scli-scn-intl/index.html