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why-am-i-narrating: babyha-nel47: alixy: This picture is in time with the average heart rate. What you’re hearing is the sound of your blood pumping, which you aren’t normally aware of. This picture tricks your mind into making yourself aware of your heart rate, so you hear it. OH MY GOD. THIS GIF.  I can’t not reblog this, no matter how many times I see it.

Added at 1:15am — 55,030 notes