Twenty-five sextillion is an inconceivably large number. Think 25 followed by 21 zeros. Now take a deep breath! You have just inhaled roughly that many molecules! Quite mind-boggling, but if you...
According to manufacturers, 8 million or so humidifiers are sold in the United States every year. In Canada, it has been reported that nearly half of all households use a humidifier, perhaps owing...
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