Science Deniers Notwithstanding, Human Life Begins at Conception

In the scientific debates of our day, it's important to distinguish debates about scientific facts from debates about the ethical or metaphysical consequences of scientific facts.

That human life begins at conception is a scientific fact, and has been recognized as such since the early 19th century when fertilization of the ovum by the sperm was first observed in the laboratory. That life begins at conception is as much a scientific fact as heliocentrism, and the fact that the earth is roun...