I had cut that was there one night and gone the next. Is there a scientific explanation?

Question

It was a long cut that was bleeding but not deep. Just gone overnight?

Answer

Duh, it is the nature of living things to heal themselves. 

That is not a scientific explanation. It is a generalization of observations of nature. Science does not own all knowledge. Science has only a vague of idea how flesh heals itself.

I had cut that was there one night and gone the next. Is there a scientific explanation?

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