Researchers from the School of Medicine at the University of California have shown that the more germs a child is exposed to, the better their immune system in later life. Their study found that keeping a child's skin too clean impaired the skin's ability to heal itself. From the article: "'These germs are actually good for us,' said Professor Richard Gallo, who led the research. Common bacterial species, known as staphylococci, which can cause inflammation when under the skin, are 'good bacteria' when on the surface, where they can reduce inflammation."

Matt_dk writes with this excerpt from Space Fellowship: "Venus Express has charted the first map of Venus' southern hemisphere at infrared wavelengths. The new map hints that our neighbouring world may once have been more Earth-like, with a plate tectonics system and an ocean of water. The map comprises over a thousand individual images, recorded between May 2006 and December 2007. Because Venus is covered in clouds, normal cameras cannot see the surface, but Venus Express used a particular infrared wavelength that can see through them."

NewYorkCountryLawyer writes "A new analysis of puzzling gullylike features on Mars offers further evidence that water flowed on the Red Planet's surface, perhaps as recently as several hundred thousand years ago. The findings bolster the case that melting snow from a departed Martian ice age carved these gullies, rather than shifting sands or other 'dry' phenomena."

The Opposable Thumbs blog reports that Guitar Hero III has reached a financial milestone, becoming the first individual video game to reach $1 billion in total sales. The number is even higher if you consider the rest of the franchise. In addition to helping drive the video game industry during tough economic times (much like the Wii), it's helping other industries as well: "... aside from the fact that Guitar Hero: Aerosmith had sold three times as many copies as the band's last album during their respective first weeks, musicians whose music is featured in the game has seen a rise in music sales to the tune of 15-843 percent." And CVG notes, "... two-thirds of non-musicians exposed to music games plan to start playing a real instrument in the next couple of years." Also, Rock Band creator Harmonix may be looking into a partnership with the record labels to sell music for use outside of the games.

Today, the Black Mesa Team released an impressive trailer for their remake of Half-Life . The remake is a total-conversion mod for Half-Life 2, bringing the updated graphics and AI of the Source engine to the original game. The team has been dropping hints lately that the project, which began in 2004, is almost done, and the trailer confirms that it will be out in 2009. They also recently announced that they've "dropped Counter-Strike: Source as a requirement for Black Mesa, and from now on, the only thing you'll need to play the mod is a Steam account with any Source engine game installed! Black Mesa is now running completely off of our own content and base Source shared content, and we felt the vastly increased user base more then [sic] justified creating all the extra assets needed to make this switch."