Microbes

• There are 7 billion people on the planet. That's 7 x 10⁹

7 000 000 000 (9 zeroes)

• There are thought to be 10 trillion microbes in / on / around the average human body. That's 10 x 10¹² or more simply 1.0 x 10¹³ ^^

10,000,000,000,000 (13 zeroes)

I read it in Microbe magazine, it may be true. ^^ http://www.asmscience.org/content/journal/microbe/10.1128/microbe.9.47.2

(ps: Microbe is a serious academic journal, not to worry, this is not fakenews.)