A chemically empowered hunt for space grains
At one point, 70 per cent nitric acid is poured on the sample, which dissolves the mineral pyrite. The brownish yellow smoke consisting of nitric oxides is both toxic and flammable. Photo:Kennet Ruona Every year Birger Schmitz, Fredrik Terfelt and Ellinor Martin dissolve five to ten tonnes of limestone with highly dangerous chemicals. The aim is to find microscopic grains from fossilised meteorite
https://www.staff.lu.se/article/chemically-empowered-hunt-space-grains - 2025-08-25