nonflowering plants

impactlab_2013 00511.txt

One doctor claims that a fern extract, containing the compound polypodium leucotomos, can act as such.

He cites a human study showing less sun damage to the skin of those who were administered the active ingredient

popsci_2013 02178.txt

I don't understand why reversing the effects of the azolla event is seen as such a negative thing.

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