This is SCIENCE FRIDAY. I'm Ira Flatow. It's easy to assume that we humans rule the Earth. After all, we can clear-cut forests, we can chop the tops off mountains. We can harvest anything we want from the land or the sea. But before we get too cocky, let's not forget about those other titans of the Earth, the bugs.
How do astronauts take a bath in space? What happens to their sense of smell in a weightless environment? Two NASA astronauts aboard the International Space Station discuss the challenges of life in low Earth orbit and how their research is a stepping stone for future space exploration.
"Do I freak you out?" It's a question that haunts writer Mary Elizabeth Williams and others whom she describes as "physically different, in ways both small and large."
Williams' surgery to remove cancer more than a year ago left a 5 centimeter bald spot on the back of her head. She doesn't mind it — it's a badge of survival — but her daughter, Beatrice, fusses about it from time to time.
This is TALK OF THE NATION. I'm Jennifer Ludden, in Washington. Neal Conan is away. The man who Florida police first declined to arrest now faces second-degree murder charges for the shooting death of Trayvon Martin. George Zimmerman claims he is not guilty under Florida's Stand Your Ground law, which allows for the use of force in self-defense.