Los Angeles, CA, USA. A study in the journal Science calculates the world's total technological capacity — how much information humankind is able to store, communicate and compute.

Martin Hilbert and Priscila Lopez think they know how much information you must contend with and it is a lot more than most people know — or can know.

"We live in a world where economies, political freedom and cultural growth increasingly depend on our technological capabilities," said Hilbert. "This is the first time-series study to quantify humankind's ability to handle information."

Martin Hilbert, the lead author, is with the Annenberg School for Communication & Journalism at the University of Southern California (USC). Co-author Priscila Lopez is with the Open University of Catalonia (UOC).



Martin Hilbert, a Provost's Fellow at the USC Annenberg School for Communication & Journalism, talks about how much information the world stores, communicates, and computes.

Video courtesy of the University of Southern California (USC) Time: 00:03:45"These numbers are impressive, but still miniscule compared to the order of magnitude at which nature handles information" Hilbert said. "Compared to nature, we are but humble apprentices. However, while the natural world is mind-boggling in its size, it remains fairly constant. In contrast, the world's technological information processing capacities are growing at exponential rates."

So how much information is there in the world? How much has it grown? You should prepare for some really big numbers:

• Looking at both digital memory and analog devices, the researchers calculate that humankind is able to store at least 295 exabytes of information. (That is a number with 20 zeroes in it.)
  
  Put another way, if a single star is a single bit of information, that is a galaxy of information for every person in the world. That is 315 times the number of grains of sand in the world. But it is still less than one percent of the information that is stored in all the DNA molecules of a single human being.
  
  
• 2002 could be considered the beginning of the digital age, the first year worldwide digital storage capacity overtook total analog capacity. As of 2007, almost 94 percent of our memory is in digital form.
  
  
• In 2007, humankind successfully sent 1.9 zettabytes of information through broadcast technology such as televisions and GPS. That's equivalent to every person in the world reading 174 newspapers every day.
  
  
• On two-way communications technology, such as cell phones, humankind shared 65 exabytes of information through telecommunications in 2007, the equivalent of every person in the world communicating the contents of six newspapers every day.
  
  
• In 2007, all the general-purpose computers in the world computed 6.4 x 10¹⁸ instructions per second, in the same general order of magnitude as the number of nerve impulses executed by a single human brain. Doing these instructions by hand would take 2,200 times the period since the Big Bang.
  
  
• From 1986 to 2007, the period of time examined in the study, worldwide computing capacity grew 58 percent a year, ten times faster than the Gross Domestic Product (GDP) of the United States.
  
  
• Telecommunications grew 28 percent annually, and storage capacity grew 23 percent a year.

Name

Email

Website

Title

Comment

smaller | bigger

I have read and agree to the Terms of Usage.

Add Comment