A journey into the weird, wonderful and astonishing lives of the small but mighty creatures we can't live without. They preceded - and survived - the dinosaurs, and they will be here long after us. Working quietly and tirelessly, they give us food, uphold our ecosystems, heal our wounds and digest plastic. They could also provide us with new solutions to the antibiotics crisis, assist in disaster zones and inspire air force engineers. But their private lives are also full of fun and intrigue. Discover life on a millimetric scale.