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If you ever wondered whether starting a business is worth the hell you put yourself through, read this. Every time a new founder/billionaire is minted—and there have been plenty lately—people who aren't entrepreneurs tend to lose sight of what this calling is really about. One social entrepreneur we interviewed for our book Breakthrough Entrepreneurship, an Episcopal bishop named Rev.

Carbon is the fourth-most-abundant element in the universe and takes on a wide variety of forms, called allotropes, including diamond and graphite. Scientists at Carnegie's Geophysical Laboratory are part of a team that has discovered a new form of carbon, which is capable of withstanding extreme pressure stresses that were previously observed only in diamond. This breakthrough discovery will be published in Physical Review Letters.

Picture a camera that has no lens, no moving parts, costs fractions of a penny to make, and sees as dimly as a short-sighted worm.

The book: Little Bets: How Breakthrough Ideas Emerge From Small Discoveries, by Peter Sims; Free Press.

A human rights organization goes for a big splash with a Facebook game with both online and offline elements.

Scientists have made a curious breakthrough in computer chip technology. They've discovered that if you "prune" a chip's design--chopping off little-used functions and actually allowing it to make errors--it can result in far more power efficient and smaller designs.