8 个月
ZME Science on MSNWhy is human childhood so unusually long? The answer may lie in baby teethFrom about five months in utero, human teeth start to develop. We are born with some of our baby teeth already partially ...
If you’re an adult human, odds are you already know a thing or two about tooth regeneration. Around age six, most of us begin to lose baby teeth in a process called eruption, exchanging our ...
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