Industry veteran John Hendricks is planning to launch a SVoD service called CuriosityStream, a nonfiction platform focused on science, nature, history and technology. The Discovery Communications founder, who recently retired from the board with 2% of the shares, plans to launch on March 18th and charge between $3 and $10 per month. The tiered packages will feature an UHD option, with filmmaker David Conover (Sunrise Earth, Live from the ISS) supplying a 20-part nature documentary called Big Picture Earth for CuriosityStream. The tiers begin at $3 for standard definition, $4 for 720p, $6 for 1080p and $10 for UHD, and Hendricks says a library of 800 titles will be available at launch. The content will be a mixture of short…