Monthly Archives: January 2013

Hyenas: the “how” of female masculinization (Part 4)

This gallery contains 1 photo.

Ambiguous genitalia at birth can be produce by genetic and/or hormonal causes. Genetic causes e.g. true hermaphrodites with gonads containing both female & male genes are very rare. More frequently ambiguous genitalia are caused by mutations in genes controlling sex hormone metabolism of … Continue reading

More Galleries | Leave a comment

Hyenas: the “how” of female masculinization (Part 3)

This gallery contains 2 photos.

In part 3 we will discuss normal mammalian testosterone metabolism using a simple input/output model. We will first look at its basic biochemistry & its influence on external genital development in the fetus. Finally in part 4, using this basic … Continue reading

More Galleries | Leave a comment

Use of art to highlight the threat of global deforestation

This gallery contains 1 photo.

I have on this blog previously questioned whether art may help in the fight against rhino poaching. I was thus intrigued to see that BBC news has just reported that Dr Iain Woodhouse, an environmental scientist at Edinburgh University in Scotland, has used art … Continue reading

More Galleries | Leave a comment

Hyenas: the why of female masculinization (Part 2)

This gallery contains 2 photos.

The disadvantages for the female hyena of having a masculinized urogenital tract when giving birth are clear (see part 1) but are there advantages for the hyena’s society of a having a masculinized and very dominant female? The “why” question … Continue reading

More Galleries | Leave a comment