- Mining social networks for useful information. Fascinating work being done - especially by cellphone companies.
- Quantum cryptography is unbreakable in theory; not so much in practice.
- Rewiring the nervous system to give patients better control of prosthetic limbs.
- New ways to provide power to the world's poor. Think LEDs and biofuel-powered micro-grids, with a healthy salting of new business models.
- Engineered geothermal electricity generation. Drill hole, insert water, collect steam, generate power. Just beware the earthquakes...
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