「如果……会怎样」科普片

Make a 36-second 16:9 science what-if for [who will watch, e.g. curious teenagers on our channel], playing [where, e.g. YouTube and Shorts]. Use only numbers from the sources below; a number worked out from a source must say "worked out from" on its tag, and keep every "about" and "would".

Bright flat illustration: thick rounded shapes, a limited bright palette, soft long shadows, small people as scale markers. The question opens on a card over a small scene. One camera zooms from tiny to huge and back while four cards rise, each with one consequence: a big number with its unit, what it assumes, and a small source tag. Diagrams must be scientifically correct and say "not to scale" where they aren't. A closing card answers the question with the same qualifiers. End on a sources card listing every source, held 4 seconds. A curious vibraphone score with a whoosh on every zoom.

Question: [e.g. "What if you dug a hole through the Earth?"]
Consequences with sources: [e.g. "about 6,371 km to the centre — Wikipedia, Earth radius"]
Answer line: [one sentence, e.g. "No one has dug it. With no air, the fall would take about 38 minutes."]