What are the reasons that the news may become more biased?

If you mean how the great lakes formed, then  the great lakes began to form at the end of the last glacial period 14,000 years  ago, ice sheets  retreated, which led to exposing the basins they had carved into land which then filled with melt-water.

Answer//most children stop having seizures 2-4 years after first episode,in most every case the seizures stop on their own by age (15);