You could try studying quantum mechanics until you understand enough of the big words in the article. Then read the article again with an open mind.
If you haven't studied quantum mechanics that much, what makes you sure that the many worlds interpretation of quantum mechanics implies quantum immortality?
Run the source through a latex validation service? Something easier than that, like a browser plug in, might not exist yet.
Cephalopod axon signal velocity is low, which is a good reason to have a distributed nervous system. They have no myelin sheath.
Without color vision, how do they match their skin to the background color?