
When NASA’s Perseverance rover touched down in Jezero Crater in February 2021, it carried 10,932,295 names from members of the public, stencilled by electron beam onto three fingernail-sized silicon chips in features thinner than a human hair
Bolted to the aft crossbeam of NASA's Perseverance rover are three fingernail-sized silicon chips carrying 10,932,295 names, etched by an electron beam in features finer than a human hair — a phone book of Earthlings, now sitting in Jezero Crater.














