Posted in June 2011

Daughters get cheating gene from Dad

Daughters get cheating gene from Dad

In honor of Father’s day, I have a story about fathers and daughters. Zebra finches are socially monogamous birds. This means that, like humans, they generally form lifetime relationships with a single partner. Also like many humans, they’re known to sleep around. For males, this makes sense, from an evolutionary standpoint. The males can increase … Continue reading

Size matters for fruit flies

Size matters for fruit flies

When males are competing with each other for fertilization of a female’s eggs, which counts more: the number of sperm, or the size of each sperm? You might wonder why a guy can’t have it all but, alas, nature does make restrictions on how much energy one can devote to pumping out sperm. So which … Continue reading

Many societies have long recognized more than 2 genders

Many societies have long recognized more than 2 genders

While most Western societies only recognize two genders (man and woman), civilizations on almost every continent, and for ‘all of recorded history’ have recognized that these are not the only possibilities. Check out the map on the PBS website to learn more about these societies. Only recently, have Western cultures begun to recognize transgender individuals. … Continue reading

Eating mussels can make your semen radioactive!

Eating mussels can make your semen radioactive!

They say you are what you eat and, according to new research, eating foods high in radioactive polonium-210 will make your semen radioactive, too. The work was published in the Journal of Environmental Radioactivity by Alphonse Kelecom and Ridta de Cássia dos Santos Gouvea. They measured the polonium-210 (Po-210) levels in the semen of 5 … Continue reading