Detailed text transcripts for TV channel - DW - 20190221:05:37:00
Across the world are doing further tests that add to the analysis. claire cook is a mineralogist at the university of sheffield in the u.k. . she leads in a bar a tree studying soil and dust particles but not now is the dust and a scanning electron microscope and not a moment when mike and i played three hundred times as the scale bar on this image is fifty microns it runs in the suit these principles are really really very smooth and that's an individual one but they also will marry all together. in big clumps so you can see there's a whole different distribution of sizes some of them very sm...