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• s  occurring at or from a relative high altitude

• The Golden Toad, which lived in the high-altitude cloud forests of Costa Rica, went extinct suddenly.
• Case in point: the Golden Toad, which lived in the high-altitude cloud forests of Costa Rica and suddenly went extinct.
• They are mainly worried about avalanches and deadly high-altitude sickness instead.

• high-level

News & Articles

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• Not just for NASA anymore: How one man is taking his own photos from space
  The first man to launch a Raspberry Pi above the atmosphere with high-altitude balloons shares tips on shooting aerial photographs, crowdsourcing skills in real time, and fulfilling your dreams with cutting-edge technology.
  June 19, 2013 - Digital Trends
• Small satellites soar in high-altitude demonstration
  Four tiny spacecraft soared over the California desert June 15 in a high-altitude demonstration flight that tested the sensor and equipment designs created by NASA engineers and student launch teams.
  June 18, 2013 - Science Daily
• Venus’ Winds Are Mysteriously Speeding Up
  High-altitude winds on neighboring Venus have long been known to be quite speedy, whipping sulfuric-acid-laden clouds around the superheated planet at speeds well over 300 km/h (180 mph). And after over six years collecting data from orbit, ESA’s Venus Express has found that the winds there are steadily getting faster… and scientists really don’t know [...]
  June 18, 2013 - Universe Today