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cover of episode Did Scientists Find Alien Life Or Just Controversy?

Did Scientists Find Alien Life Or Just Controversy?

2025/5/5
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Short Wave

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Nell Greenfieldboyce
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Regina Barber
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Regina Barber: 本期节目讨论了科学家声称在K2-18b行星上发现可能存在生命迹象的新闻,以及这一发现引发的争议。 Nell Greenfieldboyce: 研究人员声称探测到与地球生命相关的硫基气体,但这在天文界引发了争议。一些科学家认为证据不足以证明发现了外星生命,并对研究结果的公布方式和公众的反应表示担忧。 Niku Madhusudan: 我们探测到可能来自两种硫基气体(DMS和DMDS)的信号,这在地球上与微生物活动有关,被认为是潜在的生物特征。虽然需要更多实验室研究和建模来验证,但这可能是我们最接近发现外星生命的时刻。 Laura Kreidberg: 我认为我们需要更强的证据来支持这一说法。目前的数据分析还处于早期阶段,信号非常微弱,需要进一步的分析和验证才能得出可靠的结论。 Ryan McDonald: 研究数据的信号强度不足以支持存在任何大气成分的结论。 Jake Taylor: 对研究数据的重新分析表明,数据中的噪声过大,无法可靠地检测到目标气体信号。最初的研究模型过于简化。 supporting_evidences Nell Greenfieldboyce: 'A press release called their results, quote, the strongest evidence yet that life may exist on a planet outside our solar system.' Niku Madhusudan: 'These are the first hints we are seeing of an alien world that is possibly inhabited.' Laura Kreidberg: 'I think this is one of those situations where extraordinary claims require extraordinary evidence.' Ryan McDonald: 'the signal is just not strong enough to say there's anything there in the atmosphere with these observations' Jake Taylor: 'there's too much noise in the data to reliably find any kind of signal of these gases or anything else for that matter'

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Recently, a group of scientists claimed they found possible signs of life on a planet called K2-18b. The news made headlines. Researchers said they'd detected sulphur-based gases that, on Earth, are strongly associated with life. But the research caused an uproar in astronomy circles because other scientists don't think the data is strong enough to celebrate an alien find just yet. In fact, they have some real issues with how this whole thing went down, and a new analysis casts further doubt on the findings. NPR science correspondent Nell Greenfieldboyce) is here to wade into the controversy — and tell us what all this means for the future of searching for life beyond our solar system. *Want to hear more about new science research? Let us know by emailing [email protected]).Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave).*Learn more about sponsor message choices: podcastchoices.com/adchoices)NPR Privacy Policy)