Hardwood floor beside 1/8th contained by hole between planks. Will it come stern, or should I saturate them? this is on a brand new floor.

this is on a brand new floor.
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Answers:    Floors do expand and contract a "little" contained by the different seasons, but not really adequate to notice below normal conditions. Did you own this professionally done, why the big gaps? If its tonge and groove close to most floors, you really won't see any difference at all even beside swelling/shrinking. You're going to have to live near it - its not feasible to step and fill every crevice with wood filler or something. Is the floor polyurethaned? If not, thats what I would do, coat will plenty polyurethane to fill within the cracks. This will create a nice smothe, even finish and will stop from dust and dirt collecting in these gap.
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if the gap is middle of your room, you sould steep it with wood filler. riddle it, sand it, stain it, and stain it again.