Most people don't pay any attention to them, since they've been around for a generation or more.

Dennis Malloy / Townsquare Media
Dennis Malloy / Townsquare Media
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They are 8-foot-tall posts with a sign that reads, "WARNING Transcontinental Cable Route Do Not Dig Anywhere in this Area..."

Dennis Malloy / Townsquare Media
Dennis Malloy / Townsquare Media
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They have a peaked small metal covering on top with a large three-digit serial number.

Dennis Malloy / Townsquare Media
Dennis Malloy / Townsquare Media
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These signs look ominous enough, almost going back to the radiation fallout signs on buildings years ago.

They started popping up around the time those signs started going away, although one has nothing to do with the other.

But if you're from that generation, it does make you pause and wonder what danger there is.

The only danger would be a mass interruption in landline communications in your area and beyond if you dug deep enough and damaged one of those heavy cables buried deep in the ground beneath those signs.

Dennis Malloy / Townsquare Media
Dennis Malloy / Townsquare Media
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AT&T started replacing old copper wire cables back in the late 1980s.

They usually run in a line that sometimes crosses roads.

You'll see a group of them for a while along a road and then they seem to disappear into the woods or a housing development.

We've all seen them from time to time and never given much thought to where they start or where they end up.

Dennis Malloy / Townsquare Media
Dennis Malloy / Townsquare Media
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These in my town run along Jackson Road in Medford, originating in Philadelphia and ending up in Atlantic City.

There is a port in Tuckerton where the cables run across the Atlantic and down to South America.

These cables run across the continent and under the Atlantic Ocean and around the world.

Dennis Malloy / Townsquare Media
Dennis Malloy / Townsquare Media
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There's no danger above them, just don't dig anywhere near them.

What would happen to NJ if we were attacked by nuclear weapons?

We used NUKEMAP by Alex Wellerstein to see what would happen if a nuclear warhead hit New York, Philadelphia, Washington or New Jersey.

The models show what would happen in aerial detonation, meaning the bomb would be set off in the sky, causing considerable damage to structures and people below; or what would happen in a ground detonation, which would have the alarming result of nuclear fallout. The models do not take into account the number of casualties that would result from fallout.

LOOK: Baby names that are illegal around the world

Stacker scoured hundreds of baby name databases and news releases to curate a list of baby names that are illegal somewhere in the world, along with explanations for why they’re banned.

Each State in America and Their Favorite Type of Cereal...

25 costliest hurricanes of all time

Although the full extent of damage caused by Hurricane Ian in the Southwest is still being realized, Ian is already being called one of the costliest storms to ever hit the U.S. Stacker took a look at NOAA data to extrapolate the costliest U.S. hurricanes of all time.  

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