An anonymous reader writes "This article has a very interesting description of the algorithms behind the ghosts in Pac-Man. I had no idea about most of this information, but that's probably because it's difficult to study the ghosts when I die every 30 seconds. Quoting: 'The ghosts are always in one of three possible modes: Chase, Scatter, or Frightened. The "normal" mode with the ghosts pursuing Pac-Man is Chase, and this is the one that they spend most of their time in. While in Chase mode, all of the ghosts use Pac-Man's position as a factor in selecting their target tile, though it is more significant to some ghosts than others. In Scatter mode, each ghost has a fixed target tile, each of which is located just outside a different corner of the maze. This causes the four ghosts to disperse to the corners whenever they are in this mode. Frightened mode is unique because the ghosts do not have a specific target tile while in this mode. Instead, they pseudorandomly decide which turns to make at every intersection.'"

cremeglace writes "No one had seen a laser reflector that Soviet scientists had left on the moon almost 40 years ago, despite years of searching. Turns out searchers had been looking kilometers in the wrong direction. On 22 April, a team of physicists finally saw an incredibly faint flash from the reflector, which was ferried across the lunar surface by the Lunokhod 1 rover. The find comes thanks to NASA's Lunar Reconnaissance Orbiter, which last month imaged a large area where the rover was reported to have been left. Then the researchers, led by Tom Murphy of the University of California, San Diego, could search one football-field-size area at a time until they got a reflection."

An anonymous reader writes "3D Printing technology has recently leapt into a new realm — we've seen printers that can create entire buildings out of stone, delicious meals out of simple ingredients, and now — perhaps weirdest and coolest of them all — a printer that can build body parts from cells!"

ogre7299 recommends an announcement out of Caltech on a milestone for HIFI, the Herschel Space Observatory's Heterodyne Instrument for the Far Infrared. "The Herschel Space Observatory has revealed the chemical fingerprints of potential life-enabling organic molecules in the Orion Nebula, a nearby stellar nursery in our Milky Way galaxy. ... This detailed-spectrum, obtained with the Heterodyne Instrument for the Far Infrared (HIFI) — one of Herschel's three innovative instruments — demonstrates the gold mine of information that Herschel-HIFI will provide on how organic molecules form in space. The spectrum, one of the first to be obtained with HIFI since it returned to full health in January 2010 following technical difficulties, clearly demonstrates that the instrument is working well. ... [The HIFI instrument had previously been offline since] August 2009 when HIFI experienced an unexpected voltage spike in the electronic system, probably caused by a high-energy cosmic particle, resulting in the instrument shutting down. On 14 January 2010, HIFI was successfully switched back on using its spare electronics, with science observations commencing on 28 February."

eldavojohn writes "I have a slightly older friend who played through the glory days of Ultima Online. Yes, their servers are still up and running, but he often waxes nostalgic about certain gameplay functions of UO that he misses. I must say that these aspects make me smile and wonder what it would be like to play in such a world — things like housing, thieving and looting that you don't see in the most popular massively multiplayer online games like World of Warcraft. So, I've followed him through a few games, including Darkfall and now Mortal Online. And these (seemingly European developed) games are constantly fading into obscurity and never catching hold. We constantly move from one to the next. Does anyone know of a popular three-dimensional game that has UO-like rules and gameplay? Perhaps one that UO players gravitated to after leaving UO? If you think that the very things that have been removed (housing and thieving would be two good topics) caused WoW to become the most popular MMO, why is that? Do UO rules not translate well to a true 3D environment? Are people incapable of planning for corpse looting? Are players really that inept that developers don't want to leave us in control of risk analysis? I'm familiar with the Bartle Test but if anyone could point me to more resources as to why Killer-oriented games have faded out of popularity, I'd be interested."

cremeglace writes with this excerpt from ScienceNOW: "You've heard the controversy. Particle physicists predict the world's new highest-energy atom smasher, the Large Hadron Collider (LHC) near Geneva, Switzerland, might create tiny black holes, which they say would be a fantastic discovery. Some doomsayers fear those black holes might gobble up the Earth — physicists say that's impossible — and have petitioned the United Nations to stop the $5.5 billion LHC. Curiously, though, nobody had ever shown that the prevailing theory of gravity, Einstein's theory of general relativity, actually predicts that a black hole can be made this way. Now a computer model shows conclusively for the first time that a particle collision really can make a black hole." That said, they estimate the required energy for creating a black hole this way to be roughly "a quintillion times higher than the LHC's maximum"; though if one of the theories requiring compact extra dimensions is true, the energy could be lower.

Arvisp writes "According to a blog post by former Google China president Kai-Fu Lee, Apple plans to produce nearly 10 million tablets in the still-unannounced product's first year. If Lee's blog post is to be believed, Apple plans to sell nearly twice as many tablets as it did iPhones in the product's first year."

dnaumov writes "FreeNAS, a popular, free NAS solution, is moving away from using FreeBSD as its underlying core OS and switching to Debian Linux. Version 0.8 of FreeNAS as well as all further releases are going to be based on Linux, while the FreeBSD-based 0.7 branch of FreeNAS is going into maintenance-only mode, according to main developer Volker Theile. A discussion about the switch, including comments from the developers, can be found on the FreeNAS SourceForge discussion forum. Some users applaud the change, which promises improved hardware compatibility, while others voice concerns regarding the future of their existing setups and lack of ZFS support in Linux."

Mike Croucher writes "Despite the fact that it is over 40 years old, Fortran is still taught at many Universities to students of Physics, Chemistry, Engineering and more as their first ever formal introduction to programming. According to this article that shouldn't be happening anymore, since there are much better alternatives, such as Python, that would serve a physical science undergraduate much better. There may come a time in some researchers' lives where they need Fortran, but this time isn't in 'programming for chemists 101.' What do people in the Slashdot community think?"