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+ - Dark Matter May Not Be Completely Dark

Submitted by StartsWithABang
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

by skaralic (#49219723) Attached to: Apple's "Spring Forward" Event Debuts Apple Watch and More

... 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

by skaralic (#48245273) Attached to: Elon Musk Warns Against Unleashing Artificial Intelligence "Demon"

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.

Comment: Re:Performance (Score 3, Interesting) 283

by skaralic (#48113031) Attached to: Tesla Announces Dual Motors, 'Autopilot' For the Model S

This is how electric will win. Performance. When I was in High-school I raced RC cars for fun, and I remembered by gear head friends giving me crap about working on "Toy cars" until I challenged one of them to a drag race, against his real, full sized muscle car, and won hands down. The torque from an electric motor is just monstrous. So much so, that I suspect if they continue to build electric sports cars, the gforce alone will become a safety issue. My drag car would pull 100amps off the starting line and could melt battery cables, and the thing only weighed 2lbs. It'd be doing the scale equivalent of over 1000mph when I got to the end of the track. Yes, yes, I know at full scale wind resistance is different and such, but still. I had a hunk of carbon fiber doing 100mph in a few feet for Christs sake.

The sorts of people that hate electric because it's a "hippie thing" will embrace it because the fact of the matter is that, in the end, it just performs better. Can't have hippies beating your Cudda with a Prius.

Random video I found on youtube as a demo:

Yeah, but does it have... soul. :D

Seriously, I like the mechanical sound of a nice inline 6 or a V8 under the hood. I love the control of a manual transmission and clutch and how it engages the driver and makes him/her an essential part of the vehicle. Yes, dual-clutch autos are faster and electric cars are even faster but something is lost in the process and it's a shame. But, most people don't care about such things so electrics will be perfect for the masses just not for us "enthusiasts". Now get off my lawn!

A rolling disk gathers no MOS.