Bathroom accessories mounted on tile walls often fall off if not mounted correctly. This is because the moisture in the bathroom weakens the surface adhesion. Conversely, mussels boast amazing adhesion as they stick firmly to rocks even underwater. Although studies are being conducted to utilize these mussel adhesive proteins (MAPs) as an adhesive, its vulnerability to oxidation has made it difficult to fully recreate their underwater strength.
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Source: Phys.org