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where do our tears come from when we cry?:'(
is hair dye bad for you?
why is the sun the colour it is?
Why is grass green?
what is a flame?
why do we have nightmares?
What do you like best about science?
Why do we have dreams?
What are these DVD's going to be about?
How long will it take for the sea animals in oceans to be in danger because of ocean acidification?
how does something get its colour