Under the researchers' scheme, water-repellent ferrous nanoparticles (basically fluids with magnetic nanoparticles floating around in them) is mixed with the oil, which could then be separated ...

A Japanese firm called Hoshinchu is producing kits for customers to produce their own floating versions of tiny house plants called Air Bonsai (pictured).

Japanese start-up 'Hoshinchu' creates floating bonsai trees by harnessing the power of repelling magnets to make the miniature plants levitate.'Hoshinchu', a Japanese start-up in Southern Japan ...