But outside the Fermi team, the focus shifted in early 2012, when a pair of papers on the Arxiv preprint server suggested hints of dark matter within Fermi's data, which are publicly available.

BBC: Fermi telescope may change to dark matter hunting

Solenoid beams have already proven their "tractor beam" abilities in laboratory tests published in the journal Optics Express, but the pulling power of Bessel beams, presented on the preprint server Arxiv in February, remains to be proved experimentally.

BBC: Nasa examines 'tractor beams' for sample gathering