Dark Energy
One listener asked about the mysterious-sounding force in the universe called dark energy, and we …
Why Is It?
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 …
New Elements
In high school chemistry, everybody learns about the periodic table of the elements. Many of them …
Begging Birds
Science reporter Bob Hirshon answers one listener's question about the challenges of avian …
Sound Laser
One listener asks: Can sound be directed into a beam, like a laser? The answer might surprise you.