You’re going to spend your life surrounded by bacteria more than any other life form. Hundreds of thousands of times more, in fact. Some are beneficial, some are deadly, and far too many are probably crawling all over your toilet, your phone and your face right now.
Microbiologists estimate there are five million trillion trillion bacteria on earth. That’s a 5 with 30 zeroes after it. If each bacterium were a penny, the stack would reach one trillion light years. Humans have identified less than 1% of them.
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