Writ in Blood
Many diseases do not give up their secrets easily. They lurk, undetected, for years or reveal their response to treatment only reluctantly and with cost. Sometimes, this means resorting to dramatic, even health-threatening procedures such as needle biopsies or exploratory surgery.
Newts and frogs are famously celebrated for their ability to regrow lost or damaged body parts, but birds and mammals — to a much more limited degree — also possess the powers of regeneration.
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