Such an instability is caused by the presence of a "retrograde" or downward-sloping seabed beneath the glacier, which means that warm water can continually get beneath the ice sheet as the grounding line retreats further and further downhill.
So huge cavities continually form beneath the dam, threatening it with collapse.
While spines continually plunge beneath the level of the waist, legs kick explosively above it or maintain powerful extensions like searchlights.
The phrase the American dream was first invented, in other words, to describe a failure, not a promise: or rather, a broken promise, a dream that was continually faltering beneath the rampant monopoly capitalism that set each struggling against all; and it is no coincidence that it was first popularised during the early years of the great depression.
Perhaps, he said, the martian methane is continually produced beneath the surface but only released when summer warming breaks an icy seal on the surface.
"Our enemies in the past decade have presented themselves in the form of extremist jihadist groups – the criminal anarchy of al-Qaida or the barbaric evil of Isis – and the ground seems continually to shift beneath our feet.
We need to push back against genocide and erasure; preserve the voices and stories of our people; honour our ancestors; strengthen our connections to the land Canada continually takes from beneath our feet.
"When a woman thus coiffed dances at a ball, she is compelled to continually bend down as she passes beneath the chandeliers," the Count of Vaublanc noted in his diary.
Johnny Depp, whose breakthrough performance was in "Edward Scissorhands," in which he wore kabuki makeup and had long gardening shears for fingers, has continually hid his ridiculously beautiful face beneath layers of foundation and wigs.
It does not seem like a particular infringement of liberty to pass through the world without being its owner, unless someone else is continually asserting property rights over the ground beneath your feet.
