In the far future, tiny bots injected into the body can do great good-or great harm, depending on what kind of bots they are.
A class of cybernetic prosthetics worn over the face
Augscannens are common handheld devices used by security and law enforcement agencies
A large vertical cave has a constant, strong wind blowing out of it from the bowels of the earth. If one was to jump into the currents they would have a controlled ascent on the winds till they reached a height where their weight and the winds force reached equilibrium. Impossible to climb down naturally. What is it? Natural winds from the earth or a complex magical protection for an underground lair?