Brains Grow by Natural Selection

How Brains Grow Into Bodies > Cause and Effect > Neurons are Domesticated Cells
Because brains grow into bodies by neural-pruning, the neurons in our brains are subject to natural selection and are different from our other cells by their need to survive giving them some independence.

 The Yin/Yang Relationship Between Plant and Animal Respir...

Richard Feynman on Science > Cause and Effect > Why You Lose Weight While You Sleep
Plants are made of air, humans breath in the oxygen they release and expel the carbon they need to grow.

 Not All Cells are Replaced in a Human Body

You Are Not the Same Person You Were as a Child > Contrast > Different Cells are Replaced at Different Rates
Our brain cells are with us for life, contradicting the claim that we are completely replaced every so many years.

 Death is Not Definite

Death is Not Assured > Emphasis > Death is Not a Law of Biology
Death is not a law of biology, and through increasing knowledge of science, we may extend our lives indefinitely.

 The Difficulty of Defining Species

Species Divisions are Complicated > Similarity > Are There Bacteria Species?
Dawkins describes the difficulty of defining any species, with missing links making it possible at all; while Frederick William Andrewes describes the difficulty of classifying bacteria, where rapid evolution and gene swapping magnify the issues Dawkins describes.