On Today's Podcast
How Death Metal Singers Make Their Extreme Vocalizations
Vocal researchers are learning how death metal singers safely produce extreme vocal distortions, in hopes of improving vocal health care.
Listen NowDecember 26, 2025
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.
Can Underwater Parks Protect Coral?
With global threats like ocean warming and acidification, it’s a tough time to be a coral.
How Jane Goodall Got Her Start
Ira talks with primatologist Jane Goodall, 50 years after her first encounters with the chimpanzees of the Gombe.
The Mystery Of The Celibate Rotifer
Bdelloid rotifers haven’t had sex for at least thirty million years and that’s puzzling.
Gassy Microbes
Some microbes produce different types of gases as a byproduct of their metabolic processes. The microbes in this Science Friday Video released an odorless and flammable gas called methane. The type of gas or gases released by a microbe depends on the species and their metabolic characteristics. In this activity, students will conduct an experiment to observe the metabolic process of yeast by using household ingredients. Students will vary conditions in the yeast’s surrounding environment and observe the amount of gas that the yeast releases
What is Nanotechnology?
Nanotechnology is the study of what happens when things get very, very small – only a few atoms in size. The word “nanometer” means one billionth of a meter, perhaps five or six atoms long. At the nanoscale, materials can have very different physical or chemical properties, even though they are the same. In particular, super thin films of material, only a few nanometers thick, can cause interference within light reflecting off them, resulting in beautiful displays of colors.
Sound Science
Sound is all around us. Everything we hear in our day-to-day lives has a distinctive sound, from the jingling of keys to the tapping of footsteps in a hallway. Sound is created when objects vibrate. These vibrations cause the air around them to vibrate, sending sound waves in various directions. Some objects tend to vibrate at a specific rate. This is known as their resonant frequency. In this activity, students will explore the vibrating nature of sound and how it travels from molecule to molecule.
Mushroom Prints
In this lesson, students will be amateur mycologists–collecting and analyzing various mushrooms. Through observation and discussion, students will gain knowledge of the basic anatomy of mushrooms, their life cycle, and their method of reproduction through spores. Students will learn to create spore prints of mushrooms and label and preserve their spore prints, just like a mycologist. Students also will learn that by comparing spore prints, they can identify different mushroom species.
High Schoolers Give Hot Dog A DNA Test
Brenda Tan and Matthew Cost, high school seniors from Trinity School in New York City, used a technique called DNA barcoding to find out what species were present in over 200 animal products.
Snowflake Safari
Next snowstorm, grab a magnifying glass and try snowflake hunting.
Yet Another Reason To Spike That Eggnog
A perennial holiday dilemma: will alcohol kill the bacteria in homemade eggnog?
The Cheese Chronicles
Author and cheese expert Liz Thorpe explains the science of cheesemaking.
Moths Can Escape Bats By Jamming Sonar
For over 50 million years, bats and moths have been engaged in an evolutionary arms race: bats evolving new tricks to catch moths, and moths developing counter-measures to escape bats.
Ocean Priorities
Ira talks with Peter Seligmann, chairman of Conservation International, and with Philippe Cousteau Jr. about the connections between ocean policy, the environment, and the economy.
Turing Award Winner Barbara Liskov
Ira talks with Barbara Liskov, the winner of this year’s Turing Award, what’s been called the Nobel Prize of computing research.
Another Reason To Spike That Eggnog
It is a question on the minds of many people this season: will adding alcohol to the homemade eggnog safeguard against salmonella?
Jane Goodall On The Future Of Evolutionary Science
In this segment, Ira talks with primatologist and anthropologist Jane Goodall about her work in studying chimpanzees, preserving habitats, and what lies ahead for the field of evolutionary science.
Water Balloons in Space
About ten years ago, two scientists had a little extra time on board NASA’s low gravity aircraft and came up with the idea of popping water balloons.
Chile Peppers
In this segment, live from Tucson, Arizona, we’ll take a scientific look at the chile pepper, from the chemistry and biology of a pepper’s burn, to the psychology of why some people like it hot. Grab some salsa and listen in!