300 horas
BRADY HARAN: I want to deal with a number that must be the most requested so far on Numberphile, and that is 301. Now, for those of you who don't pay much attention to the YouTube view counters, you...
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Here's a candle Stirling engine we've just acquired. It's a kit form which is unusual, I've got one or two in my collection but not a kit yet. So if we light the thing...
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It all started with a big bang. Wait, we don't have to go back that far. The earth was formed 4.5 billion years ago. No, still too far. Try this. It's the middle ages. People in...
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