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Why are Christmas cracker jokes funny?
... they're crafty plays on words and they're funny in their own way, aren't they? Is it then that laughter is like a ... like they're starting to learn what's funny. In my own research, we found that even by 18 to 24 months, parents, ...
What causes tectonic plates to move?
... crust, you're subducting it back into the Earth under its own weight. What we're actually seeing is that the plates are ...