242) 28/12/2008
Today I learnt that the first 4 billion years of our planet can be described as the "Pre-Cambrian" period. Although this period contains seven-eighths of the Earth's history; we know far more about the half a billion years which came after it - leading up to the present day!
----------------------------------------------
skip to main |
skip to sidebar
Quite simply: I write down one new thing I've learned each day.
No comments:
Post a Comment