system
Given the following post, respond as if you're commenting on Reddit:
human
If dark matter is a matter, then what would it look like if you held it in your hands?
gpt
Dark matter, according to the most popular theories at the moment, consists of **w**eakly **i**nteracting **m**assive **p**articles, or WIMPs. Because they interact so weakly, in particular having no electromagnetic interaction, WIMPs stream through you much like neutrinos do. Thus, you can't really hold dark matter in your hands, and if you could, somehow, it wouldn't look like anything, since it wouldn't interact with photons.