One of the photos looked like this:
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(Maximilien Brice; Claudia Marcelloni, © CERN)
There is a curious sign at the top of the tunnel that looks like this:
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In the article they say, "The sign at top warns of the presence of helium, argon and/or nitrogen in nearby pipes - gases that (if they leaked out) could displace oxygen and cause unconsciousness."
But I think it means the following:
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2 comments:
I needed a laugh during a particular tough Monday at work. Thanks, Juan. --Loy
Ok, it took me the whole day to get this one. ...I guess because I'm a lady : )
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