The Earth could be heading for disaster. In the lead up to COP26 the team discusses The Emissions Gap, a new UN report which has found that even if countries around the world stick to their emissions pledges, the planet will still warm by 2.7°C, which would be catastrophic. Legendary sci-fi writer Kim Stanley Robinson makes an appearance, discussing his climate heroes, thoughts on geoengineering and on the future of the planet. The team unveils the news that a signal from space that looked like it was sent by aliens… probably wasn’t aliens. They also explain why sperm quality is declining in American men, prompting predictions that the average sperm count will hit zero by 2045. And they discuss the news that Elon Musk’s Tesla has become only the sixth US company ever to reach a trillion dollar valuation. On the pod are Rowan Hooper, Chelsea Whyte, Alice Klein and Leah Crane. To read about these stories and much more, subscribe at newscientist.com/podcasts. If you’re interested in listening to the Sleep Whispers podcast, follow this link.

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#91: Earth heading for climate disaster; Kim Stanley Robinson looks to the future; hunt for aliens; Tesla worth $1 trillion