Sep
25
- Homeschooling / parenting blog
- A tree grows from a seed. A tree is much more massive. The “stuff” comes from the air! Basically, the tree absorbs carbon. WOW.
- The doubling function, exponential functions, and the implications for anything that inexorably increases each year by some percentage. Energy consumption, population growth, economic growth, costs… also – what’s a billion?
- Spectacular or interesting photos from flickr