It's not hard to take three meals every day nowadays. But who would have thought anyone with right mind skips breakfast, or eating sufficiently could shorten one's life, or otherwise perfect diet could induce fatal disease?

For those who are naive to the English language above use of their is singular

natural selection on the next hierarchy level up

Complicated things may not and can not be described in words, or more precisely in speech. Out of those things sizable proportion can be described in shapes or other graphical means. This part faintly sounds mathematics and in part they ar…