Humans have two sex chromosomes; women have two X chromosomes and men have one X…
Karina KakMarch 3, 2015
An endoscope is a medical tool used to internally examine a patient's body. It's a thin,…
Karina KakMarch 2, 2015
Beautiful and resilient skin is what many women strive for as they age. A lot of the…
Jane ZhouFebruary 11, 2015
