. . . "The Carbon Mineral Challenge is a citizen science project dedicated to accelerating the discovery of carbon-bearing minerals. The program launched in 2015 December with sponsorship from the Deep Carbon Observatory. The project ended in 2019 September, with 31 new carbon-bearing minerals found from 27 locations."@en . . . . . . . . . . . "10166"^^ . "1071015183"^^ . . . . . . . . . . . . . "The Carbon Mineral Challenge is a citizen science project dedicated to accelerating the discovery of carbon-bearing minerals. The program launched in 2015 December with sponsorship from the Deep Carbon Observatory. The project ended in 2019 September, with 31 new carbon-bearing minerals found from 27 locations."@en . . . "Carbon Mineral Challenge"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "51628151"^^ . . .