The word 'mortgage' comes from a French law term that means 'death pledge'.
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The lifespan of mammals is about 1 and a half billion heartbeats.
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A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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