Retinitis pigmentosa (RP) patients typically become blind after a period of years in which their eye sight slowly deteriorates. Generally they develop night-blindness first, then tunnel vision, after which finally the central eye sight diminishes leaving them with basically no eye sight, bar some...

You know how your cells die all the time and new ones are made to replace them, so you practically have a new body every maybe 5 years? Many people say you become a completely different person every several years, but what about neural cells, do they get replaced? I believe it would cause a lot ...