Producing sperm is necessary to procreate and but procreation only happens the first time in those birth control public awareness films. In most cases, sperm must be produced continuously, and for an extended period of time, to insure reproduction.

A new study reveals that there are differences in reactivity to retinoic acid in spermatogonial stem cells, and these differences are a key factor to the persistence of sperm production with inexhaustible stem cells. 

A new gold standard has been set for openness and reproducibility in research - and it was done by Cambridge computer scientists. At a talk today at the 12th USENIX Symposium on Networked Systems Design and Implementation in Oakland, they are going to unveil peer-reviewed results with 200 GB of data and 20,000 lines of code.

Understanding extinct species diets requires greater understanding of the relationship between skull biomechanics and animals ancestry than previously thought, according to a new study. 

Consumers can reduce the risk of Campylobacter food poisoning by up to 99.2% by using disinfectant wipes in the kitchen after preparing poultry, according to a new study

Thinking "time is money" can be a barrier for people to act in environmentally friendly ways, even for tasks like recycling that take mere seconds, according to UBC research.

"Putting a price tag on time leaves individuals to focus on their own needs and goals, as opposed to the needs and goals of others, including the environment," says Ashley Whillans, PhD student in UBC's Department of Psychology and lead author of a paper on the subject. The paper featured five studies that employed different methods, ranging from the analysis of a British household survey to true and false quizzes. The research covered more than 7,000 individuals.

Do overweight kids watch more television, or does television cause weight kids? That has long been the contention for people seeking a magic bullet in obesity: If we just reduce television time, kids won't be fat.