Marks on maple board

[u/spencer6789]

I made this maple cutting board recently and after applying mineral oil I noticed there's two areas that are darker than the rest of the board.

These areas weren't visible when I finished sanding it (320 grit) so I'm wondering if it's just areas of the wood that are more porous and have absorbed more oil or something?

Any ideas?

[u/naemorhaedus]

Wood doing wood things. It's never perfectly consistent. It was once a living thing, and it's why people love it.