Honeybees routinely travel up to 2 miles (3 km) from their hive in search of food before returning home, with remarkable accuracy. Relative to body size, this is comparable to a human traveling hundreds of miles and finding their way back without a map, compass, GPS, or smartphone. Despite possessing brains smaller than a sesame seed, bees accomplish this feat with astonishing efficiency. Now, researchers have adapted those same biological principles into a drone navigation system that can guide lightweight flying robots home using just 42 KB of memory.