Galaxies in the universe are arranged in a lacy structure that contains many holes, or voids, that are largely bereft of galaxies. But the voids are not completely empty; astronomers expect they are criss-crossed by filaments of dark matter.
Now, astronomers have found a total of 14 galaxies that appear to be part of a dark matter bridge at least 1.5 million light years long.
The string of galaxies spans just 0.5% of a ‘mini-void’ – a region of space containing mostly dim, dwarf galaxies kept small by their relative isolation from other matter. But the underlying dark matter bridge may be far longer than that.” (New Scientist)
- Dwarf galaxies need dark matter too (scienceblog)
Now, in the post-9/11 era, American anti-intellectualism has grown more powerful, pervasive, and dangerous than at any time in our history, and we have a duty — particularly as educators — to foster intelligence as a moral obligation.
Or at least that is the urgent selling point of a cartload of books published in the past several months.” — William Pannapacker, an associate professor of English at Hope College, in Holland, Mich. (Chronicle of Higher Education)
[Jonathan Haidt is Associate Professor of Psychology at the University of Virginia, where he does research on morality and emotion and how they vary across cultures. He is the author of The Happiness Hypothesis: Finding Modern Truth in Ancient Wisdom.] (The Edge)
College is seen as the open sesame to a good job and a desirable way for adolescents to transition to adulthood. Neither reason is as persuasive as it first appears.” (The American)
The Holy Grail of fractals (Skytopia)