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As if spiders aren't creepy enough.....
If they're fossils, how they glow?
johnk, from the report:

//In some animals' eyeballs, a membrane called the tapetum (tuh-PEE-tuhm) sits behind the retina and reflects light back through it. If you've ever seen a cat's eyes seem to glow green at night, that's their tapeta at work. By giving the retinas a second chance to absorb light, tapeta boost the night vision of moths, cats, owls, and many other nocturnal animals. So, too, in these ancient spiders, whose silvery tapeta still shine in the fossils.//
Well, that's one cool spidey.

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Fossil Spiders - The Eyes Have It

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