Monday, June 5, 2017

Earth: Only 7 Cycles of Climate Change in SixHundred Fifty Thousand Years

Earth, otherwise known as the World or the Globe, is the third planet from the Sun and the only object in the Universe known to harbor life. It is the densest planet in the Solar System and the largest of the four terrestrial planets. Wikipedia

Age4.543 billion years
The Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 7,000 years ago marking the beginning of the modern climate era — and of human civilization. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.
Radius3,959 mi
Mass5.972 × 10^24 kg
Area196.9 million mi²
Population7.347 billion (2015) World Bank