An email from Cosmoquest led me to find
Physicists Narrow Range of Potential Masses for Dark Matter Candidate
articles. Technical details at Theoretical bounds on dark matter masses
and on the Arxiv. The mass range is 10−3eV≲mφ≲107eV. Thus
we have a range from neutrino masses (still very uncertain, but nonzero) up to about 1/10
the mass of a muon. This appears to exclude WIMPs, which were
in trouble. This also suggests that finding dark matter is not a justification for building a more powerful particle accelerator than the LHC; 107eV is well
within the range of the LHC and other current devices.
We still do not have a complete theory of quantum gravity, but apparently enough is understood to make such calculations possible. I am looking forward to
seeing what other theoretical physicists say about this.
User Explains Why Elves’ Eyes In Lord Of The Rings Shouldn’t Look The Way They Do, but in fact
there is no problem.
In The Two Towers Legolas claims to clearly see the horsemen of Rohan at a distance of 5 leagues.
How is this possible when you consider the curvature of the Earth? You can come up with some bizarre
ideas about Elven anatomy which are not suggested in the books or seen in the movies. However, there is a
an elegant answer based on the nature of Arda, Tolkien’s world. It was flat, not round, until the end of the
second age. At that time the Valar made it round so that mortals could not access Valinor. But Elves
could still go there. For them the Earth was still flat and they could sail the straight path to Valinor.
Hence for Legolas the curvature of the Earth and the horizon
did not exist and hence he could accurately see the horsemen 5 leagues away.
The Mathematical Reason All Hipsters Look the Same
Citing The hipster effect: When anticonformists all look the same
When hipsters are too slow in detecting the trends, they will keep making the same choices and therefore remain correlated as time goes by, while their trend evolves in time as a periodic function.
Fundamental Physics Prize Co-Winner Sells No Wine Before Its Time
Brian Schmidt is the world’s only vintner with a Nobel Prize in physics, specializing in pinot noir because the climate and soil (or terroir) is especially well suited for that varietal. He and is wife own a four-star winery called Maipenrai (Thai for “It’s all right”) in Sutton, New South Wales, near Canberra.
The link between atmospheric CO2 and rising global temperatures cannot be dismissed as a case of “correlation and causality.” Continue reading
The Epic Story of Johann Bernoulli.
No profession is free from the kind of miserable jerks who ruin it for everyone else. No intelligence level is either. When great intelligence, prestige careers, and big egos come together, things get ugly. Johann Bernoulli was, as a person, very ugly.