TIL NASA semiconductor research led to the creation of a toothpaste based on nanoparticles of the calcium mineral that makes up 97 percent of your enamel

https://spinoff.nasa.gov/Semiconductor_Research_Leads_to_a_Revolution_in_Dental_Care
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https://www.reddit.com/r/todayilearned/comments/1g459vm/til_nasa_semiconductor_research_led_to_the/