Discovery Ian O’Neill covered the 14th International Mars Society Convention in Dallas, Texas The message was clear: it is imperative that we send a manned mission to Mars.
Nextbigfuture contributed two items. The early universe could have had intense magnetic fields that could have been a hyperbolic metmaterial in the vacuum if a recent arxiv paper is correct. This could be detected by analyzing the cosmic background radiation.
A recent look at the work of the work to develop computer chips that can be spacecraft that are propelled by the lorentz force. Such chips could eventually be launched near to 1% of the speed of light from the magnetic field of Jupiter.