Watch these six dots move across the map and be moved yourself: this is a story about coming of age, discovery, hardship, death and survival. Each dot is a tag attached to the talon of a Swainson's Hawk. We follow them on their very first migration, from northern California all the way down to Argentina.
Advertisement Four million miles (or if you prefer, 6.44 million kilometers) is quite a distance. It's the equivalent of driving around Earth's widest point, the equator, 160 times in a row. Well that's about as close to the sun as NASA is willing to take its new Parker Solar Probe (PSP).