The size of the Internet – and the human brain

Last September I asked if the human brain were a hard drive how much data could it hold?

The human hard drive: the brainI concluded that approximately 300 exabytes (or 300 million terabytes) of data can be stored in the memory of the average person. Interesting stuff right?

Now I know how much computer data the human brain can potentially hold, I want to know how many people’s brains would be needed to store the Internet.

To do this I need to know how big the Internet is. That can’t be too hard to find out, right?

It sounds like a simple question, but it’s almost like asking how big is the Universe!

Eric Schmidt

In 2005, Executive chairman of Google, Eric Schmidt, famously wrote regarding the size of the Internet:

“A study that was done last year indicated roughly five million terabytes. How much is indexable, searchable today? Current estimate: about 170 terabytes.”

So in 2004, the Internet was estimated to be 5 exobytes (or 5,120,000,000,000,000,000 bytes).

The Journal Science

In early 2011, the journal Science calculated that the amount of data in the world in 2007 was equivalent to around 300 exabytes. That’s a lot of data, and most would have been stored in such a way that it was accessible via the Internet – whether publicly accessible or not.

So in 2007, the average memory capacity of just one person, could have stored all the virtual data in the world. Technology has some catching up to do. Mother Nature is walking all over it!

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