Mice kept in the deep freeze for 15 years have fathered healthy offspring, say scientists in Japan and Hawaii.
The sperm appeared lifeless when thawed out but researchers were surprised to find that they produced viable offspring. [BBC]
Mice kept in the deep freeze for 15 years have fathered healthy offspring, say scientists in Japan and Hawaii.
The sperm appeared lifeless when thawed out but researchers were surprised to find that they produced viable offspring. [BBC]