With thanks to The Register - article by Lewis Page.
'Everyone, one hopes, is well aware by now of metamaterial - remarkable conceptual stuff which might be used in coming years to make invisibility cloaks; or more realistically, invisible sheds. Few, however, have spotted the critical flaw in a metamaterial cloak, shed or cladding - people so concealed would no more be able to see out than those outside could see in.'
Also see Boffin predicts invisible sheds on market in 5 years
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