Say What
Sometimes our mouths seem faster than our brains. One podcast listener asked why that is.
Why Is It?
Black Holes
When Disney made the movie "Black Hole" in 1979, no one was sure whether black holes were …
Pheromone Perfume
In honor of Valentine's Day, we explore some modern-day love potions that claim science on their …
Moon Origin
When Apollo astronauts went to the moon, they wanted to find out where it came from. Now one of our …
Dark Energy
One listener asked about the mysterious-sounding force in the universe called dark energy, and we …
Fault Line
San Francisco and Los Angeles are on different tectonic plates. One listener asked what consequences …
Jupiter Moons
Jupiter's moons are like a miniature solar system of contrasting terrains. But how could moons that …
Cloning Sickness
Many cloned animals have unusual health problems. One listener asked what goes wrong.
Air in Space
Even astronauts' waste water is put to work in the extreme environment of space.
Smallest Thing
Everyone's interested in world records. Bob Hirshon answers a listener's questions about the world's …
MS Genetics
Some diseases arise as a result of a combination of genes, environmental factors, and chance. Bob …