Short Wave

Explore how lower gravity and higher radiation in space dramatically alter the human body. Discover the impact of microgravity on eyesight and heart health, and the fascinating twin study that sheds light on human adaptation. Hear about the reactivation of viruses like shingles and the psychological effects of isolation during long missions. Plus, get a glimpse into astronauts' emotional connection to Earth and the technological advancements spurred by their extraordinary experiences in space!

Jon Hamilton, NPR science correspondent and neuroscience expert, dives into the fascinating topic of how the brain cleans itself. He discusses the critical glymphatic system responsible for removing waste during sleep, shedding light on its role in preventing diseases like Alzheimer's. Hamilton reveals groundbreaking research on the effects of a specific 40 hertz sound that stimulates brain cleansing processes. This innovative approach could pave the way for new therapies to enhance brain health and tackle neurological challenges.

Sushmita Pathak, a journalist from Delhi, discusses India's monumental plan to link rivers aimed at addressing extreme flooding and drought. More than a century in the making, this ambitious project could transform water distribution across the country. Pathak sheds light on the potential ecological and societal impacts, as well as the challenges posed by a water mafia that disrupts fair access for farmers. The conversation delves into the pressing need for transparency in data and collaboration with scientists to mitigate unforeseen consequences.

In this engaging discussion, Pien Huang, an NPR science correspondent known for her in-depth exploration of wildlife, illuminates the enchanting world of synchronous fireflies. She shares fascinating insights about their mesmerizing light displays and the mystery behind their synchrony, particularly in Congaree National Park. Pien also addresses the pressing conservation issues facing these magical creatures and encourages community involvement through initiatives like the Firefly Atlas. Join her on a journey that blends science, wonder, and the importance of preserving nature.

Brian Nord, a computational cosmologist, dives into the intriguing world of dark energy and its vital role in the universe's accelerating expansion. He discusses how this mysterious force pushes galaxies away faster over time, prompting fascinating theories about the end of the universe. Nord highlights methods scientists employ to study dark energy, the implications for cosmic dynamics, and various potential scenarios for our universe's fate, painting a captivating picture of what lies ahead in the vast cosmos.

Ashley Smart, a Senior editor at Undark magazine known for her investigative work on the Human Genome Project, discusses the ethical concerns surrounding DNA donation. She reveals that over two-thirds of the project's genetic information comes from a single unconsented donor, known as RP11. This reliance raises critical questions about consent and representation, particularly for marginalized communities. Smart emphasizes the importance of transparency and ethics in genetics, pushing for informed discussions on the implications of such decisions.

TikTok has ignited a skincare frenzy among teens, with the 'glass skin' trend leading the way. This multi-step routine promises a flawless glow but may cause irritation and damage to young skin. Dermatologists are concerned as more teens embrace these risky practices. Alongside this cautionary tale, the podcast also dives into the extraordinary swimming feats of two lion brothers facing perilous conditions. Meanwhile, the wonders of distant exoplanets are explored, blending science with engaging anecdotes.

Nell Greenfieldboyce, an NPR science correspondent and ant enthusiast, joins to reveal the fascinating world of ants and their unexpected medical skills. Ants can perform lifesaving amputations on injured nest mates, a practice that may have existed longer than human surgery. Their social support and altruistic behaviors showcase their advanced decision-making and care for one another. The discussion highlights how these tiny creatures exhibit complex survival strategies, including self-amputation, all contributing to the welfare of their colony.

Dive into the fascinating world of dark matter, the invisible substance that shapes our universe. Discover how it constitutes most of the cosmos while remaining undetectable. Scientists discuss the indirect methods used to uncover its secrets, tracing its historical roots through remarkable discoveries by astronomers. Learn about the challenges faced in mapping its distribution and the new theories that challenge our understanding of the universe. Brace yourself for a journey into the unknown, probing the mysteries that lie beyond our visible reality.

Melissa Cristina Marquez, a shark scientist and PhD candidate from Western Australia, dives into the crucial role sharks play in ocean health. She passionately discusses how sharks help mitigate climate change by regulating marine ecosystems. The conversation reveals their surprising impact on seagrass growth and the balance of marine life. Marquez also addresses misconceptions about sharks, advocating for their conservation and urging us to rethink our views on these misunderstood animals.