Barbara hands Doug and Karen the following list of questions:
Do ghosts haunt old houses at night?
How old is the earth?
Should I follow the advice of my daily horoscope?
Do species change over long periods of time?
Should I exercise regularly?
''Of course, you can make up other questions if something is happening in the news or if it's related to an earlier lesson. And sometimes I include moral or religious questions to make it clear that they lie outside science."
"I can see that these would get students thinking," says Karen. "I guess understanding the nature of science really is relevant to real life."
"That's what this exercise is about."