Time passes by, we'll find we grow older and older day by day. All of our body organs also will become older as well as eyelashes. That is, our eyelashes will fall out along with our ages. When we are kids, part of organs are still in developing, just like these organs that eyelashes have a growth time, and then they become thick and black. Finally, they will be thin because of ages, exactly metabolism is worse day by day. As we all known, our cells can produce melanin which leads to our skin and hair and eyelashes look black. But with time flies, we become strain and fatigue which give a sigh of our metabolism are weaker and weaker. What surprised me is eyelashes will not fall out entirely. By the way, we should have a proper attitude toward ages and body changing.