نجاة محمود محمد

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21 remarkable new animal species that will freak you out (pictures)

If It Feels Like Stress Is Killing You, That's Because It Might Be

When you feel frazzled, so do your organs and cells<p>Chronic stress stems from many circumstances, such as poverty, a bad marriage, or long-term ailments. Its repercussions—elevated cortisol levels and inflammation—can wear us out, from the cellular level on up to our major biological systems.<p>Nervous …

Immune System