Grandma's Experiences Leave a Mark on Your Genes - May 2013 Discover. Your ancestors' lousy childhoods or excellent adventures might change your personality by altering the epigenetic expressions of genes in the brain.
Human Body Ingredients via imaginaryfoundation: 'The average human has approximately 100 trillion cells and each cell is made of approximately 100 trillion atoms, each of which were originally created in the center of a star.' Here it is by mass: http:/
Phylogenetic Tree of Life -The OpenLearn site used to offer this phylogenetic chart in the shape of a tree as a free poster, but no more. They do have an online version of this same illustration, expandable and with links and an explanatory guide.