- Henry David Thoreau (plato.standford.edu)
Henry David Thoreau (1817–1862) was an American philosopher, poet, environmental scientist, and political activist whose major work, Walden, draws upon each of these various identities in meditating upon the concrete problems of living in the world as a human being. He sought to revive a conception of philosophy as a way of life, not only a mode of reflective thought and discourse.
- Chromium (Wikipedia)
Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal.