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?
This thread is archived
More posts from the explainlikeimfive community
ELI5: Why does it feel colder inside in the winter even though the thermostat says the temperature is the same?
ELI5: Why is grief so physically exhausting?
ELI5: Why are solar panels only like ~20% efficient (i know there's higher and lower, but why are they so inefficient, why can't they be 90% efficient for example) ?
ELI5: What is a “super computer” and what can it do?
ELI5: If sound waves travel by pushing particles back and forth, then how exactly do electromagnetic/radio waves travel through the vacuum of space and dense matter? Are they emitting... stuff? Or is there some... stuff even in the empty space that they push?
ELI5 : How does gravity cause time distortion ?
ELI5: Japan's Hayabusa2 capsule returned to earth from an asteroid 180 million miles away...
ELI5: Why is alliteration so pleasing to the human brain & tongue?

Content: 13.3k
1.2k comments
9.7k
Posted by
u/NadxCH
2 days ago
Technology
ELI5: What is a “super computer” and what can it do? 9.7k
934 comments
8.4k
Posted by
u/Nurpus
21 hours ago
Physics
ELI5: If sound waves travel by pushing particles back and forth, then how exactly do electromagnetic/radio waves travel through the vacuum of space and dense matter? Are they emitting... stuff? Or is there some... stuff even in the empty space that they push? 8.4k
911 comments
3.6k
Posted by
u/jesaispasjetejure
6 days ago
Physics
ELI5 : How does gravity cause time distortion ? I just can't put my head around the fact that gravity isn't just a force
EDIT : I now get how it gets stretched and how it's comparable to putting a ball on a stretchy piece of fabric and everything but why is gravity comparable to that.