Falling
A free-falling object without any adaptation to flight can only be sustained by the wind if it is very light and falls more slowly than the wind blows it upwards.
Many mould and bacterial spores, even live bacteria, are small enough to be carried long distances and to great heights on the wind.
Some plants also use the wind for seed dispersal in this way. Orchid seeds are very small and dust-like.
Read more about this topic: Unpowered Flight
Famous quotes containing the word falling:
“Lionel Johnson comes the first to mind,
That loved his learning better than mankind,
Though courteous to the worst; much falling he
Brooded upon sanctity....”
—William Butler Yeats (1865–1939)
“The health of the soul is something we can be no more sure of than that of the body; and though a man may seem far from the passions, yet he is in as much danger of falling into them as one in a perfect state of health of having a fit of sickness.”
—François, Duc De La Rochefoucauld (1613–1680)
“New ideas come into this world somewhat like falling meteors, with a flash and an explosion, and perhaps somebody’s castle-roof perforated.”
—Henry David Thoreau (1817–1862)