An anonymous reader writes "Researchers have discovered a promising method to regrow damaged nerves in adults. Brain and spinal-cord injuries typically leave people with permanent impairment because the injured nerve fibers (axons) cannot regrow. A study from Harvard and Carleton University, published in the December 10 issue of the journal Neuron, shows that axons can regenerate vigorously in a mouse model when a gene that suppresses natural growth factors is deleted. Here is the journal article (subscription required to view more than the abstract)."

KentuckyFC writes "According to quantum mechanics, a vacuum will be filled with electromagnetic waves leaping in and out of existence. It turns out that these waves can have various measurable effects, such as the Casimir-Polder force, which was first measured accurately in 1997. Just how to exploit this force is still not clear. Now, however, a researcher at an Israeli government lab suggests how it could be possible to generate propulsion using the quantum vacuum. The basic idea is that pushing on the electromagnetic fields in the vacuum should generate an equal and opposite force. The suggestion is that this can be done using nanoparticles that interact with the vacuum's electric and magnetic fields, generating the well-known Lorentz force. In most cases, the sum of Lorentz forces adds up to zero. But today's breakthrough is the discovery of various ways to break this symmetry and so use the quantum vacuum to generate a force. The simplest of these is simply to rotate the particles. So the blueprint for a quantum propulsion machine described in the paper is an array of addressable nanoparticles that can be rotated in the required way. Although such a machine will need a source of energy, it generates propulsion without any change in mass. As the research puts it with magesterial understatement, this might have practical implications."

Ars Technica has a great look at the latest installment in the Ratchet and Clank series, "A Crack in Time." Along with the great looking graphics and same great gameplay, A Crack in Time offers a brand new game mechanic: "time pads." Time pads allow you to make a copy of yourself and move through a series of action, then shift back to "real time" and interact with your past self. "It's a game mechanic that's hard to describe in words, and wrapping your head around it inside the game isn't much easier when it's first described with an example or two. You have to play with it and bend time to your will before you see just how ingenious the whole thing is. The puzzles begin simply and grow harder as the game moves on. The use of time is done very well and elevates what we've played of the game from another platforming experience to something truly special."

J. L. Tympanum writes "I used to ignore spam but recently I have been using the opt-out feature. Now I get more spam than ever, especially of the Nigerian scam (and related) types. The latter has gone from almost none to several a day. Was I a fool for opting out? Is my email address being harvested when I opt out? Has anybody had similar experience?"

TechDirt notes the publication of the New Jersey voting machine study, the attempted suppression of which we have been discussing for a while now. The paper that the Princeton and Lehigh University researchers are releasing, as permitted by the Court, is "the same as the Court's redacted version, but with a few introductory paragraphs about the court case, Gusciora v. Corzine." What's new is the release of a 90-minute evidentiary video — the researchers have asked the court for permission to release a shorter version that hits the high points, as the high-res video is about 1 GB in size. See TechDirt's article for the report's executive summary listing eight ways the AVC Advantage 9.00 voting machine can be subverted.