Explaining Biology on Instagram: "Dead bodies can sometimes appear to move, and it’s due to natural biological processes after death—not anything supernatural. Here’s why it happens: Why it looks like movement Muscle relaxation: After death, muscles lose control and can relax or shift slightly. Rigor mortis: Muscles stiffen over hours, then later relax again, which can cause small changes in posture. Gas buildup: Decomposition produces gases in the abdomen and chest, which can move limbs, cause