This site submitted the Mach Effect propulsion research update
Ian O'Neill of Discover Space considers dark energy manipulation with metamaterials as a possible pathway to warp drive spaceships.
Centauri Dreams considers the recent report about interstellar hydrogen dangers for a near light speed spacecraft. Centauri Dreams proposes not exceeding 10% of light speed until those issues are resolved.
Carnival of Space 142 at astroblogger has a lot more astronomy and space articles.
Richard Obousy has several other interesting articles on Casimir Effect Manipulations and warp drives.
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