Title: ELI5:If teeth, hair and nails are made of the same thing, why do teeth not grow back if broken? : explainlikeimfive
Headings: ELI5:If teeth, hair and nails are made of the same thing, why do teeth not grow back if broken?
ELI5:If teeth, hair and nails are made of the same thing, why do teeth not grow back if broken?
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Content: I guess my new question is what is gravity ? :) and how can weight affect it ? 3.6k
555 comments
828
Posted by
u/watsgarnorn
2 days ago
Earth Science
ELI5: Japan's Hayabusa2 capsule returned to earth from an asteroid 180 million miles away...
How the hell did it travel such a long distance? 828
92 comments
768
Posted by
u/lVlarsquake
2 days ago
Other
ELI5: Why is alliteration so pleasing to the human brain & tongue? 768
72 comments
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