Grand unified theories are very attractive because they can explain:
A) why the universe consists mostly of matter.
B) why the Big Bang never made any antimatter.
C) why we have five fundamental forces in the universe today.
D) why the cosmic microwave background radiation is very smooth.

Question

Quizplus · Accepted Answer

Grand unified theories can explain why the universe consists mostly of matter by postulating that in the early universe, there was a process called baryogenesis that resulted in a slight excess of matter over antimatter. This excess eventually led to the formation of all the matter in the universe we observe today.

Grand Unified Theories Are Very Attractive Because They Can Explain