This Is How Much Dark Matter Passes Through Your Body Every Second
“Dark matter, to the best of our knowledge, is out there in all directions. It may be invisible to our eyes, but we can feel its gravitational force. It passes through all the matter in the Universe, including human beings, as though it weren’t there at all. There are, to the best of our knowledge, no collisions or interactions other than its effects on curving spacetime. It doesn’t clump, cluster, or form structure like dark atoms or molecules.
And yet, if it has even the tiniest hint of an ability to collide with either normal matter or radiation, we’ll be able to detect it. Over the course of your life, about a milligram of dark matter will have passed through your body. If even one dark matter particle interacts with one proton or electron in your body, we’ll have a chance. When it comes to dark matter — one of the Universe’s deepest mysteries — it’s hard to ask for anything more.”
There’s a tremendous amount of astrophysical evidence that indicates the existence of dark matter. Grouped together in large, diffuse halos that surround every galaxy in the Universe, dark matter’s gravitational effects can be seen all across the Universe. This implies that there’s dark matter everywhere, including in the galaxy, in the Solar System, in the Earth, and even in your body. It’s not static, but simply passes right through you. If we can calculate and/or estimate how much dark matter there is and what it’s properties are, we can even come up with a figure for how much dark matter passes through you every second, and learn what that means for trying to directly detect it.