Saturday (Dec. 21) marks one of the four major way stations on the Earth’s annual journey around the sun.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/eYeNQu4p4kM" height="1" width="1"/>
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Saturday (Dec. 21) marks one of the four major way stations on the Earth’s annual journey around the sun.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/eYeNQu4p4kM" height="1" width="1"/>