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The world’s natural history collections hold billions of biological specimens, many of which still contain DNA. Scientists exploring these genetic repositories are gaining new, historical perspectives on how animals evolve.
Tiny charges inside human cells spur development of an embryo’s form and structure. In a Q&A, Michael Levin talks about using those sparks to fix birth defects, control cancer and regrow tissues.
Genetic advances may make it possible to grow transplantable tissues in other species. That could solve immunity and availability issues, but raises ethical concerns.
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