This year, as every year, we present our list of the 10 technologies we find most exciting—and most likely to alter industries, fields of research, and even the way we live. The list comprises projects in a broad range of fields.

TR10: Peering into Video's Future

The Internet is about to drown in digital video. Hui Zhang thinks peer-to-peer networks could come to the rescue.

TR10: Nanocharging Solar

Arthur Nozik believes quantum-dot solar power could boost output in cheap photovoltaics.

TR10: Invisible Revolution

Artificially structured metamaterials could transform telecommunications, data storage, and even solar energy, says David R. Smith.

TR10: A New Focus for Light

Kenneth Crozier and Federico Capasso have created light-focusing optical antennas that could lead to DVDs that hold hundreds of movies.

TR10: Neuron Control

Karl Deisseroth's genetically engineered "light switch," which lets scientists turn selected parts of the brain on and off, may help improve treatments for depression and other disorders.

TR10: Nanohealing

Tiny fibers will save lives by stopping bleeding and aiding recovery from brain injury, says Rutledge Ellis-Behnke.

TR10: Digital Imaging, Reimagined

Richard Baraniuk and Kevin Kelly believe compressive sensing could help devices such as cameras and medical scanners capture images more efficiently.