I don't know why you make fun of historical facts about how the ancients knew the earth was not flat. It's pretty simple. If poles of equal length in the ground but in different locations on the earth cast different shadow lengths at the same time of day, the earth must be round. It's the only way to explain it. Amazingly, they were able to calculate the circumference of the earth to within 3% by simply pacing the distance between the poles (were over 100 miles apart) and measuring the length of the shadows. It's called geometry. Learn it.
Where did King David speak of embryos? I'm sure the bible is incorrect here as well but I will wait to see.