How much do you know about the Square Cube Law? Not much, I wager.
Enough to know that bumblebees can’t fly.
When theory conflicts with observation, look for a modification of the theory; apply Occam’s Razor; and rule out hypotheses that cause more problems than they solve.
Little Green Men; impossibly wild planetary movements; neutronium bones; waxing or waning gravity; internal phlogistan sacs: all fun, but they don’t describe reality.