Half a croissant, on a plate, with a sign in front of it saying '50c'
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"Dark" warning signs

A surprising omission
  (+4)
(+4)
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There are warning signs for ionizing radiation, biohazard, corrosives, flammables, explosives and lasers.

Distinctive international-standard graphics warn against trap hazards, the need for eye or hearing protection, and many others.

We suggest a set of standardized signs for "dark" matter and energy.

These signs could be placed anywhere, to alarm, confuse and disturb.

A label might, for example, read "WARNING ! Weakly interacting Dark Matter in this area. Take appropriate precautions", or "Danger ! Undetectable Dark Energy beyond this point !"

Then see who panics and/or tries to sue ...

8th of 7, Apr 10 2017

"WARNING: Dangerous levels of neutrino radiation beyond this point" https://what-if.xkcd.com/73/
As this page shows, there is a need, somewhere in the universe, for such a sign. [hippo, Apr 10 2017]

Warning signs http://i.imgur.com/eBJLBBi.jpg
May be applicable [8th of 7, Apr 10 2017]

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       Oh.   

       So not about letting you know that the light switch has not been turned on.
normzone, Apr 10 2017
  

       Could the "dark" warning be a warning light?
MaxwellBuchanan, Apr 10 2017
  

       Incidentally, about this dark matter, I think I know what it is. If - in addition to having no meaningful interactions except for gravitation - it frequently borrows and fails to repay money, then dark matter is Sturton
MaxwellBuchanan, Apr 10 2017
  

       "Now, neutrinos. Well, a neutrino is almost, but not quite, nothing. It's something that hardly does anything, except exist. If you have trouble visualizing this, think of your son-in-law."
8th of 7, Apr 10 2017
  

       //Well, a neutrino is almost, but not quite, nothing.//
So, what happens when you shine a light on a neutrino? Does it, y'know, cast a ...
neutrinos_shadow, Apr 10 2017
  

       Those warnings signs could label the aisles in warehouse 13.
wjt, Apr 11 2017
  


 

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