If Earth heats up beyond 1.5 degrees, the impacts don't get just slightly worse--scientists warn that abrupt changes could be set off, with devastating impacts around the world. As the 27th annual climate negotiations are underway in Egypt and the world is set to blow past that 1.5°C warming threshold,
Emily Kwong talks to climate correspondents Rebecca Hersher and Lauren Sommer about three climate tipping points--points of no return that could cause big changes to the Earth's ecosystems.

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Michigan's Jocelyn Benson and Minnesota's Steve Simon beat election deniers to oversee voting systems in their states. A key race in Arizona remains undecided. Nationwide, no major violence broke out at polling sites and losing candidates have generally chosen to concede rather than raise allegations of fraud.

This episode: White House correspondent Tamara Keith, voting correspondent Miles Parks, and senior political editor and correspondent Domenico Montanaro.

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Researchers are launching a make-or-break study to test the conventional wisdom about what causes Alzheimer's disease. And in a recent small study, the antidepressant effects of ketamine lasted longer when an intravenous dose was followed with computer games featuring smiling faces or words aimed at boosting self-esteem. As science correspondent Jon Hamilton heads to the Society for Neuroscience's annual meeting, he talks to Aaron Scott about his most recent reporting on depression and Alzheimer's, and previews what he'll be talking to researchers about at the meeting.

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Democrats outperformed expectations last night. Despite Biden's unpopularity and big economic headwinds, abortion politics and the unpopularity of Trump-backed candidates helped stave off a Republican wave. The House still looks like it's headed for GOP hands but not by a huge margin and the balance of power in the Senate is still uncertain.

This episode: White House correspondent Tamara Keith, political correspondent Susan Davis, and national political correspondent Mara Liasson.

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Last month, Short Wave explored the evolutionary purpose of laughter. Now, we're talking tears. From glistening eyeballs to waterworks, what are tears? Why do we shed them? And what makes our species' ability to cry emotional tears so unique?

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The balance of power will take time to sort out, but here are some firsts you can talk about around the water cooler Wednesday: Vermont becomes the final state to elect a woman to Congress, Florida is sending the first member of Gen Z to the House and Massachusetts has elected the nation's first openly lesbian governor.

Find the latest results at npr.org

This episode: White House correspondent Tamara Keith, political correspondent Susan Davis, and national political correspondent Mara Liasson.

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Regina G. Barber talks with Dr. Rosalyn LaPier about ethnobotany--what it is and how traditional plant knowledge is frequently misunderstood in the era of COVID and psychedelics. And, how it's relevant and important for reproductive health today.

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More than 40 million Americans have already cast ballots in the 2022 midterms, but be prepared: results may not come quickly Tuesday night. We take a look at what races could serve as bellwethers for either Republicans or Democrats.

This episode: White House correspondent Tamara Keith, voting correspondent Miles Parks, and senior political editor & correspondent Domenico Montanaro.

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World leaders have gathered in Egypt this week to begin climate talks at the 27th Conference of the Parties. However, there are still outstanding questions about who should pay for climate change losses and damages. Vulnerable countries hit hardest by climate change are asking the wealthier countries most responsible for these damages for compensation.

Climate change correspondent Lauren Sommer joins Emily Kwong to talk about this debate — and the case one island nation is making to seek payment.

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Trump and Biden signed off on historic amounts of stimulus money that helped the country's economy weather the pandemic, but — on top of supply chain straggles and shutdowns — that money may have come with a downside: increasing inflation. Now, as voters considered their midterm voter, rising costs are top of mind.

This episode: political correspondent Susan Davis and White House correspondent Asma Khalid.

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