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It's True. Anything that has a density less than 1.0 will float in water. Our human body can float because we have a weight or gravity just less than 1.0.
AL2006

That statement may be considered true. 'Specific gravity' is the ratio of
the density of a substance to the density of a reference substance.  The
reference substance is nearly always water, and the ratio of the density
of water to the density of water is obviously ' 1'.  So there you are.

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