Assertion: neutrino | /r/HasProperty | hard to detect
Facets:
Source sentences:
text: Neutrinos are hard to detect because their mass, if they indeed have any, is extremely low, and they possess no electric charge; a chunk of iron a few light-years thick would absorb only about half of the neutrinos that struck it.
text: Neutrinos are hard to detect because their mass, if they indeed have any, is extremely low, and they possess no electric charge; a chunk of iron a few light-years thick would absorb only about half of the neutrinos that struck it.
text: Neutrinos are hard to detect because they interact only very weakly with other forms of matter.