-
What Drives Human History?: A View from Big History
- Historically Speaking
- Johns Hopkins University Press
- Volume 6, Number 5, May/June 2005
- pp. 28-31
- 10.1353/hsp.2005.0053
- Article
- Additional Information
28 Historically Speaking · May/June 2005 their thermal and elemental gradients steepen with time; more data are needed to describe stars as they age. Normalized energy flows increase from protostars at "birth" (