Short Wave Folgen

Nearly tied with 2016 for the hottest year on record, 2020 was hot, hot, hot! NPR climate reporters Rebecca Hersher and Lauren Sommer explain why more heat trapped in the atmosphere means longer heat waves, less ice in the Arctic, bigger wildfires, and more powerful hurricanes. For more reporting on the hottest decade, check out this story. You can follow Rebecca on twitter @rhersher and Lauren @lesommer. And, as always, email us at shortwave@npr.org.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

Physicists have done the math and there should be as much antimatter as matter in the universe — but that hasn't been the case so far. NPR correspondent Geoff Brumfiel explains what's up with matter's "evil twin," antimatter. (Encore episode)Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

The mirror self-recognition test has been around for decades. Only a few species have what it takes to recognize themselves, while others learn to use mirrors as tools. NPR science correspondent Nell Greenfieldboyce talks us through mirror self-recognition and why Maddie's dog is staring at her. For more science reporting and stories, follow Nell on twitter @nell_sci_NPR. And, as always, email us at shortwave@npr.org.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy