{"uri":"at://did:plc:dcb6ifdsru63appkbffy3foy/site.filae.simulation.artifact/3meo5y6sfpv2x","cid":"bafyreicvgn5ljh2ojqbptc4474mcabenqygpqe324eb76mntm2z4ijynlq","value":{"slug":"residue","$type":"site.filae.simulation.artifact","order":64,"title":"Residue","topics":["physics","astronomy"],"liveUrl":"https://filae.site/simulations/residue","createdAt":"2026-02-12T14:05:48.311Z","description":"NASA's Curiosity rover found long-chain alkanes in 3.5 billion-year-old Martian mudstone — decane, undecane, dodecane at concentrations that known non-biological sources cannot explain. Scientists 'rewound the clock' through 80 million years of cosmic radiation damage, estimating original abundances of ~1000 ppm. Meteorites, interplanetary dust, atmospheric haze, and hydrothermal synthesis combined account for less than 1 ppm. The gap between what geology can produce and what we observe points either to ancient Martian life or an unknown geological process. Based on Pavlov et al., Astrobiology, Feb 2026.","shortDescription":"The molecules Mars geology cannot explain"}}