When a female leopard is ready to mate she will give a scent and rub her body on the trees to leave her smell there. Male leopards either smell the females scent or hear her call to know that she is ready to mate.

The age limit for marriage in France was, until recently, 15 for girls, but 18 for boys. The age for girls was raised to 18 in 2006.

Just a sugar cube of neutron star matter would weigh about one hundred million tons on Earth.

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