The "materials and methods" attachment is free and includes some images: https://www.science.org/doi/suppl/10.1126/science.abi9407/suppl_file/science.abi9407_sm

The "materials and methods" attachment is free and includes some images: https://www.science.org/doi/suppl/10.1126/science.abi9407/suppl_file/science.abi9407_sm.pdf https://www.science.org/doi/suppl/10.1126/science.abi9407/su... (paper is not yet available on scihub)