Medary.com

Science News has the details:

A team of Jackson Laboratory scientists have figured out a simple, cost-effective process to freeze mouse sperm and get it to achieve high fertilization rates with mouse eggs. The breakthrough will greatly reduce the cost of developing and distributing new mouse models of human disease.

OK, yeah, it's important for medicine and science and stuff.  But it's more fun from here just to meditate upon the phrase "frozen mouse sperm."  Then giggle uncontrollably.

Some day I'll grow up.