Challenges to it include observations of globular clusters judged to be too old for it to be correct.  
Challenges to it include observations of globular clusters judged to be too old for it to be correct.  Another problem arises when considering baryon asymmetry, or the fact that the universe has far more matter than antimatter. Some of the strongest evidence for it is given by Hubble's Law, which states that the redshift from other galaxies is proportional to their distance, thus supporting the expanding space paradigm.  FTP, name this theory which proposes that the universe was initially an extremely dense, hot mass which exploded.
Challenges to it include observations of globular clusters judged to be too old for it to be correct.  
{Big Bang} Theory