How Things Really Work on Instagram: "A starfish eats using a unique external digestion system driven by simple mechanics. When it finds prey like a clam, it uses hundreds of tube feet to pry the shell open just enough to start feeding. Then it everts its stomach—pushing it outside its body—to begin breaking down the food externally. This method allows the starfish to digest prey it could never fit into its mouth. Once the soft tissues are liquefied, the stomach absorbs the nutrients and retract

PEEPER on Instagram: "Follow us (@PEEPER) for more! 👀 In this optical illusion, known as induced motion or vection, a stationary woman on a median appears to glide forward like on a conveyor belt due to marathon runners streaming past her in the opposite direction on both sides. The brain relies on relative motion cues: the background (runners) moving backward tricks it into perceiving the foreground (woman) as advancing. This exploits how our visual system prioritizes contextual movement over