No, it's still not saying anything about the eventual US launch, but Spotify is now causing a minor ruckus across the pond, where it's just announced some changes to the free version of the music streaming service. The timeline for the changes varies depending on when you signed up, but the short of it is that users will have six months of access to the free service as it is now, after which they'll face some stricter limits on how much they can listen to. That includes a total of just ten hours of listening time each month, and the ability to listen to individual songs no more than five times. Of course, the obvious goal there is to get more folks to sign up for its Premium or Unlimited services, which the company notes remain unchanged.
As you may know, crafting a katana is a delicate process that involves carefully constructing a razor-sharp high-carbon edge around a soft shock-absorbent core. One day though, smiths and forging fires could be replaced by electrode-wielding mad-scientists, with the technology to selectively harden and soften metal at will. At least that's what we envisioned when we read about Jörg Weißmüller's breakthrough research in the field of nanomaterials. The German scientist discovered that by placing precious metals in acid he could create tiny ducts through corrosion. Once those channels are flooded with a conductive liquid, electrical currents can be used to harden the material and, if you change your mind about the brittle results, the effect can easily be reversed to make it soft again. The tech could eventually lead to self-healing vehicle armor or scratch-resistant cellphones -- but, really, we just want to zap our way to a high-quality samurai sword. Physorg
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