On today's Signal Check, Adrian North digs into the launch of Betterleaks, a new open-source tool from the creator of Gitleaks that scans code for accidentally committed secrets like API keys and credentials. We also cover McKinsey's major security breach where hackers accessed their entire internal AI platform in just two hours, exposing millions of messages and the firm's so-called "intellectual crown jewels." Plus, an interstellar comet carrying methanol and hydrogen cyanide offers a glimpse into the chemistry of distant star systems.