Six Literal Days -- Why question only Genesis?

Many Christians are convinced that scientists have proven that the universe is billions of years old. In Genesis 1 we learn that God created the heavens, the earth, and all they contain in six days. It's plain to see that the word "day" in Genesis 1 clearly means a literal 24-hour day. The Hebrew word for 'Day' is used more than 2300 times throughout the Old Testament, but its meaning is only questioned in Genesis. Why? Because the idea of millions of years is so ingrained in our society today. Each issue of Creation magazine contains articles by scientists refuting the millions of years and supporting a recent creation in six real days, just like the Bible says.