Scientists Searching Roofs of Ancient Cathedrals for Strange Cosmic Dust
Briefly

Think finding a needle in a haystack sounds hard? Try finding tiny rocks from space - as small as a grain of sand - inside piles of dust and debris strewn across the roofs of cathedrals.
To prevent contamination of this cosmic dust, which range in size from 50 microns to two millimeters, scientists use protective clothing while vacuuming these roofs.
Read at Futurism
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