Is the longest-lasting civilization China, ancient Egypt or Mesopotamia? Here's a look at the evidence for each of these enduring cultures.
from Livescience https://ift.tt/RwX8jgz
from Livescience https://ift.tt/RwX8jgz
For the precocious hunter of off-Earth life, the Drake equation is the ever-ready, go-to toolkit for estimating just how (not) lonely humans are in the Milky Way galaxy. But it's not useful. from Live Science http://bit.ly/2T8L56y
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