Related terms:
longitudinal study
expanding universe
randomized controlled trial
expanding
distant
Wikipedia sources:
Frame of reference
Observational learning
Metric expansion of space
Clinical trial
Current sea level rise
Twin study
Sputnik 1
Planetary science
SETI@home
Scientific realism
Edwin Hubble
Frederick Wiseman
Lazarus taxon
Repeated measures design
Orthomolecular medicine
Mughal Empire
Longitudinal study
American humor
Metformin
Context for words:
observational
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