Pic 1
<br/>A: 	Ah! Look at those birds 
<br/>B: 	Yeah! They are migrating.
<br/>Pic 2
<br/>C: 	How do you know?
<br/>B: 	When I lived in Africa, we used to see the birds flying over our village at this time of year. 
<br/>A: 	Yeah. They were going north for the winter.
<br/>Pic 3
<br/>C: 	How do they know it's north?   
<br/>B:	It's their instinct.
<br/>A: 	No, it's not only that, it's also because of magnetism.
<br/>B/C:	What? [surprised tone]. How do you know?
<br/>Pic 4
<br/>A: 	I was watching a documentary about migration of birds last week and it said it there.      
<br/>B: 	But the old men in our village used to tell me it was their instinct. 
<br/>A: 	No, it's a mystery why, but the birds follow some kind of magnetic field to migrate when they fly north each winter.        
<br/> Pic 5 
<br/>C: 	And what about other animals like turtles and whales and deer?                
<br/>A:  Apparently, it's the same for most animals.
<br/>B:  Yeah, that kind makes sense.
<br/>A:   Yes, people didn't use to know about magnetic fields but now scientists tell us that the fields help the animals find their way when they migrate. 
<br/>B:  Wow! I didn't know that! So they know which way is north and south because of magnetism?   
<br/>A: 	Yes, exactly. They know where to migrate because they can feel magnetic forces.
<br/>C: 	Amazing!
<br/>A: 	Not really! Just physics!
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