PrintRun the film backwards
Imagine a tiny videoscope placed in a woman's womb well before she became pregnant, and connected by a wireless hookup to a motion picture camera that is outside her body. Let the make—believe camera run continuously until she delivers and the newborn baby placed in the hospital's nursery. Then play the nine—month film in reverse. Your objective is to decide when the baby's human life began.
Being a physicist and not a physiologist, I thought about the Big Bang, which is the theory of the origin of the universe and which —— believe it or not —— has some relevance to abortion: Of course not the event itself, but in the ways that the astronomers researched it. I'll explain later.
Next came a thought experiment, Einstein's concept popularized by the scientific community in a famous example: in developing his renowned equation (E=mc
