Public Lecture Update | Viewing the Beginning of Time from the Most Remote Places on Earth

Picked one by one from a mixed channel. Transcript check: both title readers certain; 4 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only full-length 'Public Lecture' and 'Science of SLAC' talks, plus short videos explicitly framed as technique explainers (e.g. '... : How It Works'); exclude facility/center promo clips, time lapses, profiles and news-style features.