Science behind what causes sinkholes

After a sinkhole opened up in nearly the exact spot another hole swallowed a sleeping man in 2013, many are wondering what causes them. CBS News contributor Michio Kaku explained the geological phenomenon to CBSN.

[catfish]

Definitely wasn't expecting Michio Kaku. Couldn't have had anyone better to explain!

[texmex]

Fantastic just another thing to feel anxious about

[georgesandchopin]

Thank you, Professor, very clear and informative. Thanks for upload.

[oneiota]

So i’ve noticed that in regards to the perfectly round sinkholes we rarely if never get to see the bottom. How deep does it get? Where’s all the rushing water now? They just fly their drone all around it like there some no-fly zone like that diamond mine in Russia. Isn’t anyone else curious to see the inside of one of these?
Remember that sinkhole that appeared in that family’s bathroom? Perfectly round. Even the floor tiles were cut out round. Now how does that happen? Where’s all the rushing water now? How deep does it get?

[richarddantz]

2 Questions. Why are they so uniform? And how come they NEVER! film directly into them? Always flying just around the outside. Lemme see inside that damn hole!

[rusticbox]

I can't understand the logic, why would adding gravel and concrete stop sinkholes?
if there is water moving underground, by blocking its main path would only mean that water is traveling faster around the insoluble material eroding the sides quicker!

[enochpowel]

so why build homes on ground that could swallow people and their homes up.... if the rock/stone isnt up to a certain standard such as safe, then why are these homes being built... someone needs to answer questions and stand trail....

[DavidAbella]

Im here because the Chile hole, awesome explanation very clear.

[nancyfahey]

You didn't say anything about our aquifer(s) in Florida. We had a well that went down 30' in the 1980's, that dried up possibly. Now our well goes down 110'. We've had to put a filter in, not because of any pollutants we know of, but once in a while sand would cave in and cause our washer and showers to clog.

[denmark]

Thank you, I never heard of sink holes before, now i know what it is 😊

[tommylebowitz]

The best option is to avoid places where they are likely to happen. I heard in this and other videos that Florida has sandy soil and it's never a good idea to build on sand. If you live in any of these areas, your house could collapse at any moment without any warning. Insurance might cover the financial damages, but it can't save your life or bring you back from the dead.

[Hendrikhendrik-omys]

h what gets into the ground when oil and gas are taken up? what material has the ability to stabilize the subsoil as good as oil and compressed gas nothing can replace Oil and Gas so subsoil worldwide is and will be unstable.

[techfive]

Did he say sell your house if you find it has a sinkhole? Lol

[Willowny]

Wouldn’t you just be increasing the problem by drilling bore holes in the ground???

[johnbausch]

Why ask a cosmologist about sinkholes?

[matthewfortuna]

Why are people talking during a segment ?

[quaternion]

I would've asked Terence Tao for tips on English literature

[bloodbrothers]

Why sinkholes normally shaped in perfect round???

[inyobill]

So many breathless, hyperbolic comments out of the news rooms.

[connierobbins]

Didn't mention chemical weathering underground either. Carbonic acid reacts with limestone that will weaken the rock also. I wouldn't use this clip in a school project.