Think Wednesday | April 17, 2019 Preview
Preview | 30s | Video has closed captioning.
On NATURE, join Sir David Attenborough as he explains how some birds evolved despite their inability to soar. Join NOVA for Secrets of Noah's Ark, and witness a new investigation of the Biblical flood story, leading to the reconstruction of an ark. On Breakthrough: The Ideas That Changed the World, look back in time to see how humans invented the telescope and used it to discover the universe.
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