Watching Star Trek, most of the show’s devotees wished they could likewise say “Beam me up, Scotty,” and then — thanks to the transporter, a fictional teleportation device — instantly reappear in another location. We’ll have to wait for that invention, but another medical device that appeared on Star Trek — the tricorder, which noninvasively scanned living matter to collect health information — is already a reality and in use worldwide.
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