The concept of nothing is as old as zero itself. How do we grapple with the concept of nothing? From the best laboratory vacuums on Earth to the vacuum of space to what lies beyond, the idea of nothing continues to intrigue professionals and the public alike. Join moderator and Hayden Planetarium Director Neil deGrasse Tyson as he leads a spirited discussion with a group of physicists, philosophers and journalists about the existence of nothing. The event, which was streamed live to the web, took place at the American Museum of Natural History on March 20, 2013. [more inside]
The Nature of Computation - Intellects Vast and Warm and Sympathetic: "I hand you a network or graph, and ask whether there is a path through the network that crosses each edge exactly once, returning to its starting point. (That is, I ask whether there is a 'Eulerian' cycle.) Then I hand you another network, and ask whether there is a path which visits each node exactly once. (That is, I ask whether there is a 'Hamiltonian' cycle.) How hard is it to answer me?" (via) [more inside]
Morton and Vicary on the Categorified Heisenberg Algebra - "In quantum mechanics, position times momentum does not equal momentum times position! This sounds weird, but it's connected to a very simple fact. Suppose you have a box with some balls in it, and you have the magical ability to create and annihilate balls. Then there's one more way to create a ball and then annihilate one, than to annihilate one and then create one. Huh? Yes: if there are, say, 3 balls in the box to start with, there are 4 balls you can choose to annihilate after you've created one but only 3 before you create one..." [more inside]
Legendary architect-philosopher Christopher Alexander delivers a fascinating lecture at Berkeley, in which he criticizes "modular" design and offers a radical new vision of architecture's relation to nature. Alexander is best known for A Pattern Language, which aimed to make buildings and towns more "alive" through a series of pleasing and comfortable patterns (five sample patterns can be found here). His most recent work, the four-part The Nature of Order, theorizes that life, whether organic or inorganic, emerges from a single simple process, which can be found on page 4 of Amazon's preview of the third volume. In the first volume Alexander lists fifteen properties that make a structure whole. Also worth reading: Alexander's classic essay A City is not a Tree.
The trend of mathematics and physics towards unification provides the physicist with a powerful new method of research into the foundations of his subject, a method which has not yet been applied successfully, but which I feel confident will prove its value in the future. The method is to begin by choosing that branch of mathematics which one thinks will form the basis of the new theory. One should be influenced very much in this choice by considerations of mathematical beauty.  [more inside]
Science sites of all kinds for kids. Archeology. Entomology. Natural Symphony. Baseball in Space. Philosophy. Process or Content. Science songs. Physics songs, relativity. String theory. Science and Art.
Everything I Know-Buckminster Fuller During the last two weeks of January 1975 Buckminster Fuller gave an extraordinary series of lectures concerning his entire life’s work. These thinking out loud lectures span 42 hours (audio and text available) and examine in depth all of Fuller's major inventions and discoveries from the 1927 Dymaxion house, car and bathroom, through the Wichita House, geodesic domes, and tensegrity structures, as well as the contents of Synergetics.