high/low altitudes• Asexualspeciestend to be small and live at high latitudes and high altitudes, in fresh water or disturbed ground.• The planes flew at high altitudes, so that we had no warning.• Comets, being weak, fragment at high altitudes.• Ozoneoccurs more frequently at higher altitudes, so uplands may be particularly at risk.• Its proponentsclaim that it has the advantage of functioning at high altitudes, where winds are strong and stable.• The flight began in July but was delayed for two weeks until early August following initial problems with take-off at high altitudes.• The community typically occurs on peaty soils on gentleslopes or plateaus at higher altitudes.• Dust is raised by near-surface bursts and lifted to high altitudes by the mushroomcloud.