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
  [vote for,

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]



       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


       Radiation levels beyond this point may exceed 200,000 picosierverts per hour
Voice, Dec 03 2020

       With the current upsurge in biohazard paranoia, whole new opportunities for misleading signage are burgeoning ...
8th of 7, Dec 03 2020

       'Warning: plants of this type have been known in the state of California to affect the air's CO2 levels. CO2 is a known greenhouse gas."   

       Seems like we've done random warning physics signs before though, somewhere.
RayfordSteele, Dec 03 2020


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