"We have entered the new millennium and yet we still have no idea what 95% of the universe is made of." The Large Underground Xenon experiment has failed to see a single particle of Dark Matter. Will the Lux Zeplin have better luck?
Eric Weinstein has a PhD in mathematical physics from Harvard, but has spent most of the last 10 years outside academia working as an economic consultant for a New York hedge fund. Now he apparently has a new theory of everything that claims to be able to explain quantum gravity, dark matter and dark energy. Actual details have not yet been provided and some physicists are dismissive. But his work has received enthusiastic endorsement from Oxford's Simonyi Professor of Public Understanding Marcus du Sautoy, with whom he has been discussing the theory over the last two years. [more inside]
A fascinating talk about the composition of the universe [Youtube, approx 1 hour], presented by Sean Carroll, theoretical physicist at CIT. [via] [more inside]
UniverseNewsFilter: Scientists claim to have detected dark matter! Here are NASA's press release, feature page and multimedia presentation. For an explanation what dark matter is, I refer you to this page. After all that excitement, you can sit down and work out how much dark matter is in the Milky Way.
Does dark matter exist? Dark matter has been suggested as a solution to the galaxy rotation problem where individual stars don't seem to rotate the way Newton's laws would predict. Now, some scientists are saying that observations fit with Einstein's general relativity, without any dark matter needed. I just find it amazing that no one has tried this yet.
Art from physics: it's a groovy gas. It's transonic flight. It's a pi-muon death cycle. It's a dark matter detector. It's a Super-Kamiokande with 9000 neutrino eyes. Dream on!
It ain't so dark anymore. Dark matter seems poised to assume its place among those astronomical phenomena that were predicted to exist before being observed. The planet Neptune and black holes to mention two of them. The last 100 years have really been a boom time for astronomy, and they're not slowing down.