Tooth enamel is the hardest substance in the human body, but, until now, no one knew how it managed to last a lifetime. The authors of a recent study conclude that enamel's secret lies in the imperfect alignment of crystals.
Пон-Пят:10-20 ;Cуб:10-18 ; Вск:Выходной
Адресг. Москва ул. Люблинская д.175