From the deepest hole ever drilled to the heart of Jupiter: Strata & Stars tells the stories of how we actually know what we know about our planet and the sky above it.

Every episode starts with a real question — why Venus is hotter than Mercury, how old the Earth really is, what made a giant star go dark — and follows the evidence: what was measured, what is still a model, and where scientists still disagree.

What you can expect:
• Long-form documentaries (15–25 min) built on primary sources, linked in every description
• Real images from NASA, ESA and open archives, credited on screen
• Our own diagrams, with "MEASURED" and "MODEL" labels so you always know which is which
• Some scenes are AI-generated illustrations, always labelled "Illustration". Narration uses a synthetic voice.

Spotted an error? Tell us in the comments — corrections are pinned and noted in the description.

New documentaries every week.