The Planet Crafter drops you off in the center of a barren planet devoid of plants, animals, bugs, and even bacteria. In order to complete your quests and make the planet habitable, you will need a variety of machines, from machine optimizers to recycling machines to nuclear power plants. One of the many you will want to make to fill your planet with life is a DNA Manipulator. This is a fairly late-game item, but using it is important for making new insects, animals, and plants.