Our closest genetic relatives also suffer from hair loss...

I doubt their diet looks anything like ours...and it still happens.

http://www.dailymail.co.uk/news/article-2411168/Extraordinary-images-just-similar-closest-living-relative--bonobo.html

"an older bonobo, who's head hair has fallen out, sits alone." Funny (& sad)

Ya, if you look at the pics most all of the older males are missing most of their hair.

Points to issues more than dietary problems unfortunately.

im sure monkeys probably have galeas and really tight scalps... looks a little obvious. Diet, again shared equally by all the monkeys. It could very well be hormone related though you know? But I mean cmon, it seems more related to scalp tension!

check these out and compare the difference in the same species of the uakari:

http://www.arkive.org/bald-headed-uakari/cacajao-calvus/image-G111937.html

http://www.arkive.org/bald-headed-uakari/cacajao-calvus/


NOW: Lions RARELY bald! but check out the pattern of this lions balding... its very similar to the human pattern of hair loss! Now, lets face it, lions have a pretty different anatomical make up than humans. Hormone wise, I only know they also use testosterone/estrogen like humans. Here's some food for thought: CASTRATED lions do not grow a mane/ lose their mane if their Test levels drop (such as after losing in combat, etc). Im no lion expert, but think about it guys.

http://www.flickriver.com/photos/rowlimages/5912172769/

Here are a few interesting reads.

On temperature affecting mane length:
http://www.hras.org/sw/swdec02.html

On how castration causes male lions to lose their mane:
http://bigcatnews.blogspot.com/2008/12/performing-vasectomy-on-lion-is-no-easy.html

I wonder if certain species of lion, like the Tsavo, simply have a different skull size that inhibits the delivery of testosterone to their scalp.

dudebro wrote:im sure monkeys probably have galeas and really tight scalps... looks a little obvious. Diet, again shared equally by all the monkeys. It could very well be hormone related though you know? But I mean cmon, it seems more related to scalp tension!

check these out and compare the difference in the same species of the uakari:

http://www.arkive.org/bald-headed-uakari/cacajao-calvus/image-G111937.html

http://www.arkive.org/bald-headed-uakari/cacajao-calvus/


NOW: Lions RARELY bald! but check out the pattern of this lions balding... its very similar to the human pattern of hair loss! Now, lets face it, lions have a pretty different anatomical make up than humans. Hormone wise, I only know they also use testosterone/estrogen like humans. Here's some food for thought: CASTRATED lions do not grow a mane/ lose their mane if their Test levels drop (such as after losing in combat, etc). Im no lion expert, but think about it guys.

http://www.flickriver.com/photos/rowlimages/5912172769/

I would assume the lion's mane would be similar to a human beard? Castrated/testosterone-deficient humans don't develop facial hair or at least, very little of it.

did you look at the picture? the lion still has plenty hair on the sides and back of his body. I doubt that the mane serves as the beard does to humans.

RPM wrote:"an older bonobo, who's head hair has fallen out, sits alone."  Funny (& sad)  

I know. That part cracked me up. All of us balding guys think he's sitting alone because of his lack of hair haha.

dudebro wrote:did you look at the picture? the lion still has plenty hair on the sides and back of his body. I doubt that the mane serves as the beard does to humans.

I was more referring to the fact that the mane is probably physiologically more like beard hair since castration causes it to diminish. I'll ask the next lion I see.  

Yeah I remember learning about bonobos in biological anthropology. They are eerily similar to us. Although I don't think the hair loss is. If you look at them, they are loosing hair all over their entire bodies not just their scalps. Furthermore, even the babies don't have full "heads of hair". I don't think they are loosing hair to the same mechanisms we are.

There are plenty of other primates that do appear to exhibit AGA though. Like the Stump Tailed Macaque for example.