Vitrified Sand tubes (*Quatzum vitrificatum*) (1802–17) by James Sowerby, from British Mineralogy.
Source: Smithsonian Libraries and Archives / Biodiversity Heritage Library
https://pdimagearchive.org/images/5b3a19d6-7fd4-4f84-a073-d534ba9bf2b6
Here’s how #flowers can #harvest vital metals
As demand for #nickel grows, #plants could help suck out vital raw materials from soil. Could this replace conventional #mining that’s harmful to the #environment?
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