Tagged with giant sperm

Sperm are Cool #3: Giant sperm and the Zenker organ

Sperm are Cool #3: Giant sperm and the Zenker organ

Today, I’m going to write about everyone’s favorite kind of sperm: giant. Who makes giant sperm? It’s not who you might think. The giants of the animal kingdom–whales, elephants–make sperm that are very similar to that of men and mice. Tiny. It’s the little guys who make the biggest sperm. In fact, as I’ve pointed … 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