The Fruit Flies
Maybe not the cute and cuddly little critters you expected to see on this list, fruit flies are one of the most significant bestial galactic travelers. Aboard a Nazi V2 rocket in February of 1947, the United States sent fruit flies into space from the White Sands Missile Range in New Mexico. The mission, which was a success and reached 68 miles or 109 km, was meant to test the effects of exposure to radiation at higher altitudes. While the distance may seem low to be considered “space travel,” the defined boundary is 62 miles or 100 km.