Is there actually such a thing as 'quicksand'?

Many of us remember those old Tarzan movies where natives and dastardly safari hunters met their inevitable demise in a sinister pit of quicksand. The rule of thumb ofcourse was that the more you struggled in this gunk the more you would sink and eventually be suffocated. read more

Yes, there is. As has been mentioned in other answers; quicksand is extremely fine sediment that you effectively sink into. The reason for it being so dangerous is that as your legs sink in, they produce a suction. read more

“Quicksand” is the name given to a mass of sand particles that are supported by circulating water rather than by each other. It can be found wherever sand and water can be found–especially near streams, beaches, and the mouths of rivers. read more

Yes there is such a thing, however unlike in the movies you won't sink entirely. Its density is quite high and you'll float. The danger in quicksand come from how it hinders your movement. read more