<h2 class="rtecenter">You might have recently seen a sinkhole swallowing up a street in Japan, but just what are these monstrous holes and why do they form? &nbsp;</h2><p class="rtecenter">Trace from Dnews takes a look.</p><p class="rtecenter"><iframe allowfullscreen="" frameborder="0" height="400" src="https://www.youtube.com/embed/tQvv8YFCGsY" width="650"></iframe></p><p class="rtecenter">Read next:&nbsp;<a href="http://thescienceexplorer.com/nature/world-s-deepest-underwater-sinkhole-confirmed">World&rsquo;s Deepest Underwater Sinkhole Confirmed</a></p><p class="rtecenter">&nbsp;</p> 

WATCH: How Sinkholes Are Formed

<p>You might have recently seen a sinkhole swallowing up a street in Japan, but just what are these monstrous holes and why do they form?</p> 

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You might have recently seen a sinkhole swallowing up a street in Japan, but just what are these monstrous holes and why do they form? Trace from Dnews takes a look. Read next: World’s Deepest Underwater Sinkhole Confirmed

You might have recently seen a sinkhole swallowing up a street in Japan, but just what are these monstrous holes and why do they form?

WATCH: How Sinkholes Are Formed

You might have recently seen a sinkhole swallowing up a street in Japan, but just what are these monstrous holes and why do they form?

You might have recently seen a sinkhole swallowing up a street in Japan, but just what are these monstrous holes and why do they form?

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