More Thoughts on Embryonic Egg Development
Embryonic development initiates when the temperature of the eggs gets to a certain level -- approaching the standard temp of about 99.5 degrees F or 37.5 degrees C The following url give a wondrous visual opportunity to follow the development in a chicken egg -- that would hatch in 21 days, not the 35 days of the eagle:
http://www.thepoultrysite.com/articles/1459/embryonic-development-day-by-day
From viewing that brief look at the eagle lifting up and swallowing the egg content I feel the content had about 10 - 12 days of development -- and then rotting deterioration. This would equate it to about the 6 - 8 days of the chicken embryo. My reasoning for this is: a) An infertile egg simply dries up in the shell under the heat of the incubating birds. b) Usually the infertile egg does not go bad or look rotten in this period of time. c) It is the fertile egg, the one undergoing cell division, bringing in oxygen and germs from the outside through the pores that sucks in bacteria that can take over and rot the egg once the embryo dies and is not growing. So what I believe I saw on the video was a fertile egg that had initiated development but died. The dead embryo then starts to be attacked by bacteria and deteriorates. What we saw the female take out of the broken shell appeared to me to have some "degraded" substance more like a dead embryo than an infertile yolk.
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