During one of the episodes in season one of Deep Space Nine, Sisko asks O'Brien to find his son. Since Jake doesn't have a combadge, Chief must've found him by recognizing he's the only young human on the station. That would be the best way to locate him.

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    The efficiency of Star Trek scanners varies as the plot demands. But in this case it could have found him by face recognition or tracking from a confirmed position or even more esoteric factors like heat signature or DNA scanning.
    – Jontia
    Jun 8, 2018 at 14:40
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    Or just looking for a smaller physical presence. Like, you take an infrared picture and look for a child in a group of adults. You can't recognize individuals, but a child is obviously different from an adult.
    – JRE
    Jun 8, 2018 at 16:05
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    I feel like your assumption that it needed to look for a certain age is flawed. The station's computer could have just tracked him by image/face recognition via internal sensors. Jun 8, 2018 at 16:51
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    I note that dogs can tell individual humans apart by scent, and even some humans with a much weaker sense of smell can recognize some people by scent. If there are sensors with odor sensing ability placed around the station, the station computer could use them to smell where Jake has been and where he is now. Jun 8, 2018 at 18:03
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    I think the question in the title is a valid one. The example given isn't that great, but the question should still be answerable, so let's focus on that. Jun 8, 2018 at 18:24

2 Answers 2


We know from the original series episode "This Side of Paradise," that Starfleet scanning technology can identify substructures in human bones. (Doctor McCoy checks the soundness of his equipment by running a check on himself, and it picks up that he had previously broken his ribs.) Consequently, it should be possible to identify an individual as not an adult, but noticing that the growth plates on their limb bones had not closed. That is a very crude of measuring age (distinguishing adults from pre-adults), but it is clearly within the abilities of Starfleet technology.


Medical scanners can do so. In "Rascals" (the one where Picard and co. are turned into kids), Dr. Crusher determines the effective age of the team to within a few years, and is even able to isolate the specific de-aging technobabble in play.

On the other hand, in "Collective" (the one with the Borg kids) Voyager's sensors are apparently unable to tell that the aforementioned Borg kids are, in fact, kids. (They detect the Borg neatly enough, and can isolate the right number, five, so it's not jamming or sensor failure.) This doesn't necessarily mean they couldn't distinguish between children or adults in normal species, though. It might also be that the sensors or sensor operator could distinguish them if they had reason to look for children; Voyager had no idea Borg kids were even a possibility until they investigated.

  • The borg are curiously resistant to scanners though
    – Valorum
    Jun 10, 2018 at 8:23

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