"I call it the last frontier of unexplored territory in low-Earth orbit." With thunderstorms just offshore, SpaceX's Falcon 9 rocket streaks into the sky over Kennedy Space Center in Florida to begin the all-private Fram2 mission. Credit: SpaceX Four adventurers suited up and embarked on a first-of-a-kind trip to space Monday night, becoming the first humans to fly in polar orbit aboard a SpaceX crew capsule chartered by a Chinese-born cryptocurrency billionaire. The private astronauts rocketed ...