Foam from frogs’ nests could help make bandages that release drugs

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A túngara frog (Engystomops pustulosus)

Paul Hoskisson

The foam that some frogs produce to make nests could be a good candidate for future pharmaceuticals cosmetics because it can keep its shape for more than a week, isn’t likely to irritate human skin can slowly release drugs for days.

Most synthetic natural foams – like medical foams, beer foam, the “spit” left on grass by insects called leafhoppers – collapse into a liquid within minutes or hours. But some frogs produce an incubator foam – protecting eggs tadpoles …

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