#1 The footage might make you reconsider those eggs on toast
As a source of inexpensive, high quality protein and vitamins, most people think of eggs as a staple of a healthy diet.
#2 But this video might just change your mind - as it reveals the secret anatomy of the everyday food.
#3 Chicks begin to develop much sooner than you'd imagine
The incredible footage, from American scientific journal publisher Cell Press, shows a fertilised egg's yolk sac artery being injected with ink using a finely drawn glass capillary needle - and the results are astounding.
Of course, we all know that eggs eventually become chicks. But, having cut a window into the egg to expose the embryo and placed it under a microscope, the video reveals the visibly beating heart of a 72-hour-old chick embryo. It takes about 21 days in total for an egg to hatch.
The revelation is enough to tug at the heartstrings of any animal lover - but will you be swapping your eggs on toast for butter and jam?
