If you're thinking "that's a weird looking aircraft" it's because the X-57 Maxwell uses a series of electric engines (with collapsing propellers) to boost airflow over the wings during takeoff (and landing?). This means that they can use smaller and more narrow wings which reduces wind resistance once the aircraft is up to cruising speed. Electric engines are sufficiently compact and efficient (and easily supplied with energy) that this is a viable solution for aircrafts using electric engines.