On Today's Podcast
Why are we changing the way we keep time?
Timekeeping scientists around the world voted to stop using leap seconds, but what does this mean for us?
Listen NowOctober 23, 2026
CRISPR pioneer Jennifer Doudna discusses the evolution of gene-editing technology and what it takes to be a good scientist. Timekeepers around the world voted to stop using leap seconds, but what does that mean for us? Plus, how "problem bears" help test engineers evaluate consumer products, author Kazuo Ishiguro on emotional truth in our age of AI, and the science of apple varieties.
Utah’s Winter Haze a Pollution Problem
The Salt Lake Valley’s topography lends itself to a natural phenomenon called an inversion, which traps air pollution.
Design And Build A Zip Line Zoo
In this activity from Bedtime Math, you’ll build a stuffed-animal zip line and practice measuring time, distance, and angles.
Battling HIV, Using A Body’s Own Immune Cells
Researchers are exploring a new approach to fighting HIV infection by genetically modifying a person’s own immune cells to be resistant to the virus.
17:37
Delving Into the Security of an Internet of Things
As more devices come online, is enough attention being given to security and privacy?
16:38
Where Do Sea Turtles Go During Their ‘Lost Years’?
Biologists crack the case of sea turtles’ ‘lost years’ with a little help from a nail salon technician.
22:22
Michio Kaku Imagines ‘The Future of the Mind’
In “The Future of the Mind,” physicist Michio Kaku predicts big advances for our brains.
23:51
‘Particle Fever’ Captures the Excitement of the Higgs Discovery
“Particle Fever” takes filmgoers behind the scenes of physics’ big breakthrough: the discovery of the Higgs Boson.
How to Make an Artificial Muscle Out of Fishing Line
You’ll need fiber, some weights, a motor, and a heat gun to get you started.
Pick the Winner of SciFri’s Winter Nature Photo Contest
Time to choose your favorite winter snapshot out of our 10 finalists.
A Beer Bottle Prank Is A Lesson In Fluid Mechanics
Scientists used a high speed camera to study how tiny carbon dioxide bubbles in beer rapidly expand and rise.
Make a Model of a Home Made From Shipping Containers
Watch an interview with a couple who built a home from shipping containers. Then, design and construct a scale model of a unique shipping container home using printed templates, and estimate the cost of flooring and paint based on model dimensions.
29:13
On Social Media, the Kids Are All Right
In “It’s Complicated”, Internet scholar Danah Boyd debunks myths about teens’ online lives.
9:09
Your Brain on Jazz
Researcher and musician Charles Limb created an fMRI-safe keyboard to study the effects of jazz on the brain.
6:47
This Fish Sucks
Adam Summers of the University of Washington’s Friday Harbor Labs details how the northern clingfish takes the art of suction to new heights.
16:13
A Diverse Energy Diet, to Face a Changing Climate
U.S. Energy Secretary Ernest Moniz talks about progress on President Obama’s “all-of-the-above” energy strategy.
5:45
Pulsar Pulverizes Incoming Asteroids
A pulsar 37,000 light-years from Earth collided with a billion-ton asteroid.
7:32
A 10,000-Year Stopover En Route to the New World
The ancestors of Native Americans may have lived for millennia on the Bering land bridge before fanning out across the Americas.
16:45
Making Sense Out Of Bitcoin
Bitcoin is a digital currency that was created by an anonymous developer in 2009.
For Privacy, Teens Use Encoded Messages Online
This excerpt from “It’s Complicated” explores how advances in technology afford teens new ways of communicating secretively.
This Fish Sucks
Adam Summers of the University of Washington’s Friday Harbor Labs, details how the Northern Clingfish takes the art of suction to new heights.