sinkholes Siberia

Anatoly Usoltsev, 55, vanished, but it took mining specialists from Kuzbass region to locate him.

Officials promise to monitor situation after four-fold increase in size since February.

Giant sinkhole threatens more homes as it widens each week.

Tuim Hole first appeared 62 years ago and has sheer 120 metre cliffs reaching down to its deep turquoise waters.

Experts to visit remote craters to solve the puzzle on their creation.

Same phenomenon of discharge of gas hydrates 'led to crater formation in Russia and disappearance of ships in Atlantic'.

Scientists remain confident of one day bringing back the beast to roam again in Siberia.

Reindeer herders find more craters in the far north in a deepening puzzle for scientists. 

Eurasia will split in two, dividing the world's largest land mass in southern Siberia.

Satellites show giant hole ringed by 20 'baby craters'.