Unfortunately, today many of the "smartest" people of this world deny the existence of God. Suppose one of them walks by a mountain and see that there is a tent on top of the mountain. Immediately he will think that someone went up there and made the tent. He won't think that the tent formed itself. You and I also won't think that some sticks came and dug themselves on the ground and then a cloth flew to it to form the tent. We will all think that someone went up there and made it. That is the mistake. We think that the small and simple tent on the mountain cannot form itself but we think that the huge mountain underneath the tent was formed by itself! This is how narrow our thinking has become.
Verily Allah is the creator of all things. Allah says in Surah Qaf Al Quran (50:7) "And the earth! We have spread it out, and set thereon mountains standing firm, and have produced therein every kind of lovely growth (plants)."