['If', 'one', 'analyzes', 'these', 'data', 'within', 'the', 'Friedmann', '–', 'Robertson', '–', 'Walker', '(', 'FRW', ')', 'standard', 'model', 'of', 'cosmology', 'their', 'most', 'natural', 'interpretation', 'is', 'that', 'the', 'Universe', 'is', 'spatially', 'flat', 'and', 'that', 'the', '(', 'baryonic', 'plus', 'dark', ')', 'matter', 'density', 'ρ', 'is', 'about', 'one', 'third', 'of', 'the', 'critical', 'density', 'ρcrit', '.']