Assertion: cosmic ray | /r/HasProperty | discovered
Facets:
value: because of the ionozation
type: CAUSE
value: originally
type: MANNER
Source sentences:
text: Cosmic rays were originally discovered because of the ionozation they produce in our atmosphere.
text: Cosmic rays were discovered 100 years ago.
text: Cosmic rays continue to baffle scientists more than a century after they were first discovered.