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Submission + - Dark Matter May Not Be Completely Dark

StartsWithABang writes: If you take two clusters, groups, or individual galaxies and collide them together, you'd expect the stars to pass through unperturbed, the gas to experience friction, slowing down and heating up, while the dark matter, if it's truly collisionless, will do the same thing as the stars. But if there's a tiny frictional force at work on dark matter, it, too, will slow down a little bit. A team looking at 72 groups and clusters saw no effect of slowing down, but then on the 73rd one, they saw a separation between the mass reconstruction and the stars. Is this the first sign of dark matter's interactions, or is it simply an astrophysical effect, or maybe even a fluke? A good recap and rundown of what we're looking at to the best of our knowledge.

Comment Re:Keep in mind... (Score 1) 529

... That is an advertised 18 hour battery life on day one with a brand new device. That means you'll probably be lucky to get 12 hours a day in a year or two, since rechargeable batteries tend to age poorly. By comparison, the upcoming Pebble Time advertised a week of battery life for the base model, and ten days for the Steel version.

My Garmin Fenix 2, which is an outdoor sports watch, has an advertised battery life of up to 5 weeks in watch mode, 50 hours in 1/min GPS mode and 20 hours in 1/15s GPS update mode. It has everthing (GPS, barometer/altimeter, compass, thermometer, plethora of built-in sports tracking modes, smart notifications from /any/ smartphone) in a standalone package. Granted the hockey-puck design will only appear to those that like diving watches, which works just fine for me.

Comment Re:Butlerian Jihad (Score 1) 583

Or read the back story of Dune perhaps?

The Dune series was hardly a work of deathless literature, but as for that piece of shit, save yourself the wasted calories. It is very possibly THE WORST book ever written in the history of human communication. I think I paid $1 for a used copy and even then I wanted to sue to get the $1 back plus damages for the intentional infliction of ultimate boredom.

I can attest to this. Currently suffering through the Battle of Corin. Save yourself and never pickup any one of these books.

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