T cells block nerve cell regeneration with age, but can be reversed

Re:T cells block nerve cell regeneration with age, but can b... by arcticbull on Saturday May 14, 2022 @02:29AM (#31375558)

I mean, the female hyena gives birth through the clitoris. Not all evolutionary decisions are optimal for the individual. Some are just horrifying and weird.

[ Parent | on HN ]

Re:T cells block nerve cell regeneration with age, but can b... by bbarnett on Saturday May 14, 2022 @10:35AM (#31378328)

https://www.hyaenidae.org/how-does-the-female-spotted-hyena-...

I just found this, reading up on your comment, and by god I hate SEO spam, and auto-generated docs.

[ Parent | on HN ]

Re:T cells block nerve cell regeneration with age, but can b... by Hedepig on Saturday May 14, 2022 @03:43AM (#31375894)

This.

Another example is the recurrent laryngeal nerve.

[ Parent | on HN ]

Re:T cells block nerve cell regeneration with age, but can b... by andai on Saturday May 14, 2022 @10:14AM (#31378111)

>The extreme detour of the recurrent laryngeal nerves, about 4.6 metres (15 ft) in the case of giraffes, is cited as evidence of evolution, as opposed to intelligent design. The nerve's route would have been direct in the fish-like ancestors of modern tetrapods, traveling from the brain, past the heart, to the gills (as it does in modern fish). Over the course of evolution, as the neck extended and the heart became lower in the body, the laryngeal nerve was caught on the wrong side of the heart. Natural selection gradually lengthened the nerve by tiny increments to accommodate, resulting in the circuitous route now observed.

https://en.wikipedia.org/wiki/Recurrent_laryngeal_nerve#Evid...

[ Parent | on HN ]