This growth was driven mostly by collisions between objects at altitudes between 700km and 1, 000km.
He flew at air shows, performing loops, rolls, and inverted stalls at altitudes below 100 feet.
The drone can fly for 30 hours without refueling at altitudes as high as 11 miles.
These intrepid creatures live at high altitudes and do not hibernate in the winter.
The quickened route may also take a toll on how hikers adjust to the higher altitudes.
The researchers hope to find out what happens to fluid in the lung at high altitudes.
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At low altitudes they help to cool the Earth by reflecting sunlight away from it.
The scenery belies the relatively low altitudes, with great alpine hiking at just 2, 000m above sea level.
"They would have advised the crew of the wind direction and speed at various altitudes, " she added.
Better yet is the jet's 330-knot economy cruise speed, attained at altitudes between 38, 000 and 41, 000 feet.
They are most effective when fired at aircraft flying at low altitudes, as at take-off or landing.
The B-52s are long-range bombers capable of flying at subsonic speeds at altitudes of up to 50, 000 feet.
According to a study by food scientists at the University of Reading, high altitudes dull the taste buds.
These are a result of increased turbulence and entrainment of air at higher altitudes by the simulated turbines.
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While much of the coast has been cleared for agriculture, at higher altitudes large tracts of virgin rainforest survive.
But my economic adventures in Nicaragua reached even more inspiring heights, and altitudes.
At higher altitudes, where atmospheric pressure is lower, oxygen enters the body less readily, leading to the hypoxic state.
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The jet's most economical speed, attained at altitudes between 38, 000 feet and 41, 000 feet, is an impressive 330 knots.
Base jumping sees participants launch themselves from a surface and free fall from high altitudes before opening a parachute.
Nearly 200, 000 people are in makeshift camps, mainly of tents, at lower altitudes.
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It flies supersonically at altitudes of just 23 feet, enabling it to evade even advanced anti-aircraft and -missile defenses.
It also made it hard to change altitudes when the ride got bumpy.
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After sunset, the plane slowly glides to lower altitudes on the stored power until dawn, when the process starts again.
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Base jumping sees participants launch themselves from a surface and free fall from predominantly low altitudes before opening a parachute.
High altitudes can tire the body, and fatigue plays a role in making people more susceptible to catching colds, too.
At higher altitudes the air is potentially warmer and heats the air nearer to the surface by mixing with it.
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The computer can correct the missile's course, enabling it to fly at very low, landscape-hugging altitudes, and follow a complicated route.
During high stress activities or in high altitudes those with the disease are at risk for organ degradation and even death.
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For example, at higher altitudes only certain plant and animal species can survive under long periods of snow and ice cover.
As we flew over a thunderstorm near Omaha we heard airline pilots on the radio beseeching air traffic controllers for higher altitudes.
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