nawafalardhi, maher_azizofficial, bent__masreyaa, mona_mff, bmwsclassic, anfal_333_, makaremoussama and hema_nahat like this
myhd_officialHow and when will the Universe end? Gravity and dark matter are poised to annihilate the Universe in a big crunch.
Wll expansion and dark energy tear it apart?
#watch How the Universe Works on Discovery Science HD on My-HD!
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