Triggered by the presence of bacteria, the single-celled choanoflagellate Salpingoeca rosetta divides and aggregates with its sisters to form a colony. One reason may be that the colony is a more efficient way of capturing food, like a “Death Star” sitting amidst the bacteria and chowing down. The colony is about 15 microns in diameter, or less than one-thousandth of an inch across. Credit: Scanning electron microscope image courtesy of Nicole King