How Much Computing Power Does Earth Possess and Can It Simulate a Human Brain?

[aquaregia]

Does anyone know of a good estimate of the computing power of all the computers that are on Earth and running.

Do you know how large of a biological brain it would be possible to simulate with all this computing power (eg. 100 billion neurons, 500 billion neurons, ect.)? It seems like it would be possible to simulate like a super huge brain with as much computing power as there is on the planet.

 

[robphy]

sounds like a "fermi problem"...