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 ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Most birds fly at low altitudes, relatively speaking. But there are a few species of birds that push the limits of ...