english: So by looking at things like clusters of galaxies, and how they -- their number density, how many there are as a function of time -- we can learn about how dark matter and dark energy compete against each other in structure forming.
non_english: I tako posmatrajući stvari poput grupa galaksija, i kako one -- njihov broj gustine, koliko ih ima kao funkcija vremena -- učimo o tome kako se tamna materija i tamna energija međusobno takmiče u formiranju strukture.