It is well-known since the 1980s that few places other than Venus' surface are more inimical to life as we know it. The higher athmosphere contains sulfur and a

It is well-known since the 1980s that few places other than Venus' surface are more inimical to life as we know it. The higher athmosphere contains sulfur and acid as well, but pressure and temperature are a lot nicer, and there was hope of finding something interesting there. Now that hope is pretty much gone too.