Broadcasts

A look back at the biggest science stories of 2025, and a few you may have missed. Plus, over the past year, most of your body has replaced itself cell by cell. What can we learn from other animals’ dramatic feats of regeneration? And, ultramarathoners can run with what seems like superhuman stamina. But are their bodies much different than the rest of ours?

Physicist Sean Carroll takes on black holes, Schrödinger’s cat, and other big physics concepts. Plus, we revisit some of our top stories of 2025, covering research into how death metal singers safely produce extreme vocalizations, how algorithms and social media are changing language, and what we can learn from people thriving in the coldest parts of the world.

A newly identified amoeba can survive at the temperature of a medium-well steak. Plus, a distant lava planet shows signs of an atmosphere. And, this Christmas Bird Count, we salute the fabulous, underappreciated, common species. Here’s to you, house sparrow.

Over the past century, most cancer research has focused on the tumor itself. Rakesh Jain focused on the tumor’s environment instead. Plus, a glacier’s edge can be a dangerous place to do research. One team is using robots and sound samples to monitor the melting ice. And, when cases of plague pop up in the US, it can feel straight up medieval. It’s treatable, but how and why does it persist?

A boom in construction of AI data centers is facing backlash over soaring electricity and water usage, and the resulting utility hikes. Plus, to save spotted owls in the Pacific Northwest, one plan suggests killing thousands of barred owls. And, geologist Anjana Khatwa explains how embracing wonder and awe adds to our scientific understanding of the rocks that form our planet.

The Ig Nobel Prizes celebrate unusual scientific research—this year including lizard pizza preferences and fingernail growth. Plus, in a conversation from August, exercise researchers discuss what physical activity does to mental health. And, in a story from February, a journalist explains the afterlife of our trash, and why most “recyclable” plastic actually isn’t.

Flora and “Part-Time Genius” co-host Mangesh Hattikudur put one lucky listener to the test with food science trivia. Plus, talkative African grey parrots are charismatic internet stars. A global scramble to source and sell the birds threatens their survival. And, Google’s tool for predicting how proteins “fold” turns 5 this year.

Neuroscientists are manipulating memories in mice in an effort to develop treatments for brain disorders. Plus, picking through a dozen vulture nests, scientists discovered hundreds of artifacts, including a sandal that could be more than 700 years old. And, Nobel prize winner Ardem Patapoutian tells the story of how he immigrated to the US, found belonging in science, and did groundbreaking work on sense of touch.

Two new studies suggest that, contrary to longstanding belief, dinosaurs were not on the decline before the Chicxulub asteroid impact. Plus, a giant infrastructure project aims to block invasive carp from entering Lake Michigan, but Chicago’s polluted water already keeps them out. And, Lake Xochimilco in Mexico City is the only place where axolotls live in the wild, and they face growing threats.

Why do we find joy in the scary and the macabre? Two psychology experts weigh in on humans’ affinity for horror and desire to get spooked. Plus, tales of the amazing capabilities of bats, spiders, and snakes. And, a guided tour of some of the world’s spookiest lakes.