What would aliens say when told Earthlings shift clocks twice a year to fool themselves into thinking there’s more sunlight.— Neil deGrasse Tyson (@neiltyson) November 4, 2013
Steven Pinker interviewed by Mosaic, a new venue for long-form science journalism:
As a matter of fact, religions have concerned themselves with the subject-matter of science… All the world’s major religions have origin myths, they have theories of psychology, of what animates a body that allows it to make decisions. And I think science has competed on that territory successfully: it has shown that those explanations are factually incorrect.
NBC Nightly News anchor Brian Williams mashup “Rapper’s Delight” via Slate
When Harvard biophysicist Kit Parker visited the New England Aquarium in 2007 and watched jellyfish pulse through the water, a strange realisation struck him: the way the jellyfish pulsed was similar to the human heart. He teamed up with bioengineer John Dabiri and graduate student Janna Nawroth of CalTech, and together they essentially built a jellyfish.
First, they mapped the cells of moon jellyfish (Aurelia aurita) to understand how they swim: their bell-shaped bodies consist of fibres that are aligned around a central ring and along eight spokes, and electrical signal pass through the bodies like a wave, creating the pulse that allows the jellyfish to swim. They then grew an artificial jellyfish in a tiny frame, complete with body and eight appendages—but did it without using a single jellyfish cell. Instead, it was grown from the heart muscle cells of a rat, as well as plastic silicone that mimics the “jelly” of a jellyfish’s body.
When they sent an electrical signal through the structure, the muscle contracted like jellyfish’s stroke, then the elastic silicone pulled the structure back to its original shape ready. When placed in water, it swam like the real thing. The researchers dubbed their creation “Medusoid.”
Why do such an experiment? Firstly, it’s really cool, and secondly, it has applications for human health. It’s a way of understanding muscular pumps, so this may help researchers test heart drugs and develop heart valves or pacemakers made from a patient’s own cells. “Instead of heart valves made out of aluminum or plastic, they would be built out of your own biological material,” Parker says. “That makes it more biocompatable and potentially longer-lived.”
ARC Accreditation Warehouse on D2L: Trial run with III.D Financial Resources (Greg McCormac)
Contents area shows Public Folder and III.D Financial Resources modules (other modules invisible).
Discussion List shows III.D Financial Resources discussion board (other discussion boards invisible).
Thanks, Greg! (I don’t think he likes to be called “the canary in the cave” when I’m testing D2L on his account.)
by Chi Klein
In our conversations about semi-conservative DNA replication, my students had a good base with which to scaffold the concepts studied, but versions of the same question kept coming up. “Why is there a lagging strand?” Explanations of the free nucleotides being added in the 5’…
Sam Berns, who had the genetic disease Progeria, gave a TEDx talk in October 2013 about his philosophy for a happy life. Sam died at the age of 17 in January 2014 - more about his life from the National Geographic Daily News