NASA has created more world-changing technologies than could be fit in one video, so here's part 2 of my list of NASA technologies that have changed your life.
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Links to other videos on this topic:
Space Time
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Watchmojo
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Sci Show Space
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In this video:
Water filtration
Scratch-resistant lenses
Ear thermometers
Infrared cameras
Variable smoke detectors
![](https://i.ytimg.com/vi/8bq1Q5WjPyE/maxresdefault.jpg)