Catapult

The  is the fourth Wonder structure blueprint you'll unlock while progressing through the game. It is used to send objects over long distances.

Used to
A catapult can launch objects over approximately 100 tiles measured in a straight line (thus the area that can be targeted is a disk). First, use on the catapult and target the tile where you want the objects to land. Then on the catapult while holding any carriable object (including bots) up to tier 5. The object will be sent to the target tile. If the catapult is moved, it will reset its target to the tile next to the catapult.