@historylab8: You are using fluid mechanics to protect your vision. 👁️💧 Your Eyes Liquefy Every Time You Blink: the tear film coating your eyes is a shear-thinning, non-Newtonian fluid. When your eyes are open, it stays stable like a protective gel. But the physical pressure of a blink instantly shatters its viscosity, liquefying the structure so your eyelid can glide across with zero friction before it instantly gels back together. ⚡️🧬 #BiologyTok #FluidMechanics #ScienceFacts #HumanBody #Anatomy