Last week, an unlikely research project made a startling discovery: Phosphine gas in the atmosphere of Venus. That's something that, as far as we know, is created by living organisms. Our efforts to find signs of life on other worlds, and a lot of our space dreaming in general, tend to focus on Mars. But all of a sudden we need to take a closer look at our other planetary neighbour.

So how can we find out if there's really life right next door? What do we know about Venus and why has it been so hard to figure out so far? What else could possibly cause the presence of Phosphine and what would it mean, to space exploration and everything else, if this is really true?

GUEST: Neel Patel, space reporter, MIT Technology Review

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