system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how neutrinos can travel through (it's said) a light-year of lead and not hit anything. How is that even possible?
gpt
Neutrinos have no charge, so they don't interact through the electromagnetic field.  They are the lightest of the non-massless subatomic particles, so that they have very little interaction through gravity.  They do not interact through the strong nuclear force because they are not quarks, gluons or hadrons.  That leaves only the weak nuclear force, which is much less strong than the strong nuclear force.  (Thanks to physics for some super-explanatory names).