“Planes collide in midair” — raising the question: what are the boundaries of midair<\/i> anyway? Is it midair if they’re one foot off the ground? One hundred? If there are mountains nearby, do they make a difference? When does a descending spaceship reach midair? In short, does midair<\/i> tell us anything that air<\/i> would not? Midocean<\/i> can be defined as out of sight of land, or beyond the continental shelf, or in international waters; but none of these has an obvious analogy for air. <\/p>\n","protected":false},"excerpt":{"rendered":"
“Planes collide in midair” — raising the question: what are the boundaries of midair anyway? Is it midair if they’re one foot off the ground? One hundred? If there are mountains nearby, do they make a difference? When does a … Continue reading