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In this week's QA, I wonder if there were other bombardments, how the Earth could have been oxygen rich, and why the asteroid belt isn't a planet. With a special guest answer from Tim Dodd, the Everyday Astronaut.

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","title":"Episode 489: QA 78: Why Use Crew Dragon AND Starliner? And More, Featuring Everyday Astronaut","added":1793130091,"published":1549483200,"attachments":[{"position":0,"id":"490d4ecf-2a62-4e0d-adb4-1e593a7a638c","sha256":"80e7cfa5858dcab498a7beba7ae09dcd5b5accf8e2eb5fd5e6c3e0673b8f7142","kind":"image","mimeType":"image/jpeg","width":null,"height":null,"durationMs":null,"bytes":1366748,"storageKey":"80e7cfa5858dcab498a7beba7ae09dcd5b5accf8e2eb5fd5e6c3e0673b8f7142","variants":[{"name":"original.jpg","bytes":1366748}],"originalFilename":"1.jpg"},{"position":1,"id":"971ce454-ab8f-4a66-a99f-ef83376f02fb","sha256":"1f5bce300f83412f77aef4a2a31de17f51598121ba7846c194d176a5b7c2da18","kind":"audio","mimeType":"audio/mpeg","width":null,"height":null,"durationMs":null,"bytes":20000372,"storageKey":"1f5bce300f83412f77aef4a2a31de17f51598121ba7846c194d176a5b7c2da18","variants":[{"name":"original.mp3","bytes":20000372}],"originalFilename":"1.mp3"}],"links":[],"tags":[],"comments":[],"prev":{"id":"24466573"},"next":{"id":"24569257"},"creator":{"name":"universetoday","displayName":"Fraser Cain"},"linked":[],"revisions":[]}