Of course, most of the technology on Star Trek doesn't exist for real. But at least one cool bit of Star Trek science has been made real.
In his book Cosmos, the late scientist Carl Sagan talks about the way in which the earth is regularly struck by material from outer space. These collisions with space debris can be minor–as in a shooting star on a summer night–or amazingly destructive, as in the collision that probably killed off the dinosaurs. Thankfully, the [...]