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1. Just-in-time learning. Videogames give you just enough information that you can usefully apply. You are not given information you'll need for level 8 at level 1, which can often be the case with schools that download files of information that are never applied. Videogames provide doable challenges that are constantly pushing the edge of a player's competence. This is similar to Russian psychologist Lev Vygotsky's Zone of Proximal Development. Lev Vygotsky 2. Critical thinking. When you play videogames you're entering a virtual world with only the vaguest idea of what you are supposed to do. As a result, you need to explore the physics of the game and generate a hypothesis of how to navigate it. And then test it. Because games are complex, you are continually reformulating and retesting your hypothesis -- the hallmark of critical thinking. 3. Increased memory retention. Cognitive science has recently discovered that memory is a residue of thought. So what you think about is what you remember. As videogames make you think, they also hold the potential to increase memory retention. 4. Emotional interest. Videogames are emotionally engaging. Brain research has revealed that emotional interest helps humans learn. Basically, we don't pay attention to boring things. The amygdala is the emotional center of the brain and also the gateway to learning. 5. We learn best through images. Vision is our most dominant sense, taking up half of our brain's resources. The more visual input, the more likely it is to be recognized and recalled. Videogames meet this learning principle in spades as interactive visual simulations.

"Not only are people better than computers at detecting the subtleties that differentiate galaxies, they can do things computers can't do, like spot things that just look interesting,"

And the Zooniverse team has proven that the Zooites' classifications are as good as those by professional astronomers. "Their contributions are extremely important," says Lintott. "They're helping us learn how galaxies form and evolve. And they take their work seriously." But that doesn't prevent them from bringing a sense of adventure and just sheer fun to the research.

just as the unregulated frontier of the 19th century gave rise to the age of robber barons, so the Internet has seen a rapid consolidation of power in the hands of a few corporate winners.

Otlet saw the Mundaneum as the central nervous system for a new world order rooted squarely in the public sector.

That network would do more than just provide access to information; it would serve as a platform for collaboration between governments that would, Otlet believed, help create the necessary conditions for world peace.