While there has been some talk about using these bags on a regular basis for long-distance bulk water deliveries, they seem to have a clear role to play in emergencies.
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But close orbits would broadly be too hot - the hunt seeks roughly Earth-sized planets orbiting at a sufficient distance that water, if it is there, can exist in liquid form - and not so distant that it freezes.
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Probably because the earthquake knocked out water lines for a considerable distance around.
The sizes and shapes will give them clues to the speed and distance of the ancient water flow.
Typically, capital costs will expand with distance from land and water depth and contract as the size of a project increases.
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The study recommended a minimum vertical separation distance between fracking wells and water supplies of 600m (2, 000ft).
On a recent outing, Dede spotted a couple of harbor porpoises in the distance, swimming past a water-side mosque.
He looked to see water and wood flying into the air in the distance.
While a map easily identifies the many small and large mountain lakes, mostly unknown to tourists, I was keen to find the perfect one for a long-distance, open-air, cold-water swim.
BBC: Long-distance swimming in Nepal��s glacial mountain lakes
The "pilot" controls the aircraft at a safe distance, directing the machine to hover over the water where whales are surfacing.
In Colorado's San Juan basin, for example, the water is saline and must be reinjected into wells a safe distance away from any aquifer.
Patten, 21, is no stranger to long distance swimming, having come third in the 10km open water swim and making the final of the 800m freestyle in Beijing.
Because of the distance that low-frequency sound waves can travel under water, a set of four ships emitting sound at 235 decibels could monitor 80% of the world's oceans for submarines.
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The water reflected the snowy-white outline of the Annapurna mountains in the distance.
BBC: Long-distance swimming in Nepal��s glacial mountain lakes
He likened the effect to "puddles of water" that seem to appear on road surfaces when viewed from a distance on a hot day.
The sequence of woodland vistas, the revelations of scale and distance, light and dark, building and nature, land and water, as one approaches the entrance, were superbly orchestrated by Wright.
And although they cannot compete with aeroplanes for speed, or with water-borne shipping for volume, they could cover in a few days a distance equivalent to a six-week journey by ship.
So if birds were the source, it seemingly would mean they feasted on carp, flew a long distance and excreted feces within a few hours of when the researchers collected water samples.
If a break from the water is what you're after, the hotel is near a golf course and within walking distance of Lagos' historic city center, where you can settle in on one of its many restaurant patios for fresh fish.
At times it is as though they are playing games, hovering in the distance, then beside your ear for a moment, then gone again, evaporating like the water that nourishes this cloud forest and the town at its edge.
Even the beach is not what it seems: the coral reefs stretch from the shore far out to sea, and although Egyptian laws protecting the reefs are regularly violated by developers who bulldoze their way through reefs, tourists may find they have to pick their way for some distance over the delicate sharp reefs, damaging both them and their feet, to find deep water.
In the distance, a straggling herd of wildebeest arced up and back into the grass like dolphins leaping from the water.
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