EarlySignals scores new startups the week they raise, launch, or leave stealth. Featured: Ab Astra uses cosmic-ray particles to x-ray what sits deep underground, so miners can map lithium and shale without drilling first. Link below ⬇️ Two Balseiro physics classmates built it: Germán Serrano, who spent fifteen years at YPF on Vaca Muerta reservoir work, and Hernán Asorey, who brought the particle-detection methods from the Pierre Auger cosmic-ray observatory. Their LUMINA platform turns the readings into continuous 4D density maps of a basin, a passive alternative to seismic surveys that points drills at the right rock. It closed a $2M pre-seed in June 2026 led by Draper Cygnus, with deep-tech fund CITES anchoring, and runs out of Neuquén's Polo Tecnológico. Scored 82 on scoop and 64 on potential in our July 13 issue.