We stumbled upon this supremely cool, and moderately worrisome viral video.  Gaining over 3.8 million views in 3 days, this viral hearing test and explanation of hearing loss will show you how well most people are able to hear certain frequencies based on their age. This is a fun exercise to transition into a science lesson with your kids, or an interesting piece of information for adults. Either way, it’s worth a watch! What YouTube videos have caught you attention recently?

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