Science writer Samuel Alibrando proposes a challenge to anyone who has difficulty believing that God created the earth. He says,

Let’s make a huge puzzle….  And let’s limit it to say, one million parts. It includes chemicals, scientific properties, elements, atoms, cells, changing weather, bugs, fish, reptiles, plants, dirt, mammals and instincts. Okay, can you put it together so that not one thing lacks what it needs…?