From the epic Cosmos by Carl Sagan: http://amzn.to/2BKhUix (US). For UK: http://amzn.to/2BNeP14 | Canada: http://amzn.to/2AutZu2 | This short video clip shows Carl Sagan explaining the 4th Dimension. It is a short clip from Carl Sagan's Cosmos: A Personal Voyage. Astronomy Gift Shop: http://www.astronomydvd.com/shop.aspx Astronomy / Space Pictures Page (FB) : https://www.facebook.com/Astronomy.Pictures/ Amazon associate disclosure: As an Amazon Associate I earn from qualifying purchases.
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