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By: Chanapa Tantibanchachai | Published: Jan 22, 2014

Teratogens are substances that may produce physical or functional defects in the human embryo or fetus after the pregnant woman is exposed to the…

By: Christopher Rojas | Published: Feb 11, 2015

During the twentieth and twenty-first centuries, Robert Paul Lanza studied embryonic stem cells, tissues, and endangered species as chief scientific…