Enzymes — the molecules responsible for many chemical reactions central to life — are large and complex. So large and complex that some scientists think the beginnings of life might have happened before modern enzymes evolved. How's that work? Here's where things get crazy. Turns out, protein plaques (similar to the ones that are, today, the calling card of Alzheimer's) could have played the role.
The connection between Alzheimer's and life, itself
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Paging Dr. Zaius: wild orangutan treats own wound
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Upgrade your tech for the new year with this refurbished iPad Pro, less than half price right now
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