Assertion: matter's matter | /r/HasSubevent | a top-down formation scenario
Facets:
value: with large matter aggregations
type: OTHER
Source sentences:
text: Cold dark matter leads to a bottom-up formation of structure with galaxies forming first and galaxy clusters at a latter stage, while hot dark matter would result in a top-down formation scenario with large matter aggregations forming early, later fragmenting into separate galaxies;[clarification needed] the latter is excluded by high-redshift galaxy observations.