Ibrahim and Hajar had to undergo a quite challenging demo. Ibrahim عليه السلام had to depart his spouse and son within the desert, and Hajar with her toddler son had to outlive the desert alone. Röntgen's discovery of X-rays and Einthoven's improvement of electrocardiography in the 1890s triggered improvements from https://hajar-735678.frewwebs.com/27794538/manual-article-review-is-required-for-this-article