Talk:Kenkou Cross Q&A/@comment-25827355-20150108035844/@comment-25833927-20150112160732

according to science (vSauce). Humans on medival ages, were quiet short, if you reach 13 to 15 you be count as mid age. by the age of 16 to 20 up, you been count as adult and why you reached to 40 to 50 you been count as senior. Cause most men and women on medival ages dont have proper health care like us, you will die from various diseases, So life is short.

On industrial age, science medicine become more like nowdays modern medicine.