How about exploring a softer, gentler form of flight? Certainly, gas-filled envelopes provide a large way to transport goods and people, but for a variety of reasons, have fallen out of favor in recent years. Several entrepreneurs are trying to revive an old idea. Hanging Over Our Heads One threat hanging over our heads is that of plummeting drones, either having exhausted their short-range batteries or banging up against a tall building. The infamous video of a drone falling onto a woman in Seattle has been removed from YouTube, probably for legal reasons, but an abundance of others are there for your viewing pleasure. Maybe More Truth than Poetry Alfred Lord Tennyson wrote a prescient bit of poetry in 1835, envisioning future flight into an age where Amazon might be using electric blimps to deliver necessities and frivolities worldwide. For I dipt into the future, far as human eye could see, Saw the Vision of the world, and all the …