Archive: Dark Matter, the mysterious substance in space
Listen to the original audio · Transcribed with NVIDIA Parakeet · Timestamps stay in sync with the live audio
This BBC Podcast is supported by ads outside the UK. Hello. Me Sha Clenny here. Before you listen to this episode, I wanted to share some exciting news. You can now watch this episode and all future episodes of In Our Time in full video.
Just search for In Our Time on YouTube or watch episodes twenty eight days early by subscribing to the streaming service BBC Select in the US and Canada. Hello. Welcome to this week's pick from the In Our Time Back catalogue. In our Time explores the wonders of human knowledge, but one thing I find most exciting is finding out what things we still don't know.
One of the best examples of this is in the archive edition I've chosen for this week. On dark matter. In nineteen thirty two, the Dutch astronomer Jan Ort noticed that the speed at which galaxies moved was was at odds with the amount of material they appeared to contain. He hypothesized that much of this missing matter was simply invisible to telescopes.
We already have this episode, so unlocking it is cheap and permanent: the full transcript (48 minutes, 8,926 words), segment and word-level timestamps, and .txt, .srt, .vtt and word-level JSON downloads, as many times as you like, forever.
No account needed, we create one from your checkout email. With credits it is 1 credit; packs start at 10 episodes for $5, and monthly plans are cheaper still.