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Best of Last Week–Can space travel faster than light, another planet behind the Sun and should we allow head transplants

Incompatible assumptions
An illustration of the delayed-choice experiment, which shows that a photon exhibits both particle and wave behaviors. The physicists used this experiment to show that seemingly reasonable classical assumptions may not be so reasonable after all. Credit: Ionicioiu, et al. ©2015 American Âé¶¹ÒùÔºical Society

(Âé¶¹ÒùÔº)—It was an interesting week for physics research—most of the big news was centered around space, the cosmos or how things came to be as they are. One team of physicists —suggesting that matter-antimatter asymmetry could be related to the Higgs boson particle. Another team wondered, If nothing can travel faster than light, they asked, how is it possible that there are parts of spacetime where the photons that make up light are forever out of our reach? And yet another team wondered if —they showed that objectivity, determinism, and independence are mutually incompatible with any theory.

In space news, a team of researchers wondered . More aptly, they used science to put the sci-fi myth to rest once and for all—no, there is not another planet just like ours hiding behind the sun. Period. Meanwhile, another team discussed —3753 Cruithne orbits our planet in a horseshoe quasi-orbit, wobbling and swaying. Also, another team announced —the brightest quasar in the early universe.

In other news, officials in California announced that —it is the project conceived by Elon Musk that seeks to put passenger pods inside tubes and push them using fans and magnets at speeds up to 200mph. —it is the emulsifiers that are used to enhance texture and prolong shelf life. And scientists in Russia announced that —believed to be related to global warming, the sudden appearance of such craters is causing officials to be worried about public safety.

And finally, if you have grown tired of your body, then perhaps someday soon you could get a new one as —Sergio Canavero suggests the technology may be at hand so we might want to start considering whether we ever really want to do such a thing.

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