July 18, 2025
Across the country, premiums are rising and home insurers are pulling out of markets that are most at risk for climate change-fueled disasters. Plus, the New World Screwworm is creeping north, threatening cattle in Mexico and the US. And, a new book explores the poisonous concoctions in Agatha Christie’s murder mysteries and the science behind how they kill.
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.
The Modern Dog
In this hour of Science Friday, we’re going to the dogs, literally.
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!
Spore and Evolution
How close is the new computer game Spore to the way evolution really works?
What Put the Heat in Chili Peppers?
New research indicates that chili pepper plants may have developed their signature heat as a way to fight off fungal infections caused by insects.
Looking Inside the Human Brain
What’s really going on inside your head? We’ll talk with scientists using functional magnetic resonance imaging to study the workings of the human brain.
Building Social Robots
Sure, robots can weld car parts or stack cartons on an assembly line. But can they develop friendships with people? In this hour, Ira talks with inventors developing robots with personalities. How soon will it be before social, lovable robots enter our homes?
Oliver Sacks: ‘Musicophilia’
How does music affect the brain? Join Ira in this segment for a conversation with neurologist and author Oliver Sacks about the brain and music.