Swans on Tea

Students Who Use ‘Clickers’ Score Better On Physics Tests
If, like me, you don’t already know what a clicker is and how it’s used, read this (buried nine paragraphs in) first:
In clicker classes, multiple choice questions appear on a large computer screen at the front of the lecture hall. Students hold the wireless devices, which resemble [...]

Hubble Kaleidoscope Finds Evidence Of Space Looking All Crazy
“With their unprecedented resolution, the latest images from the new kaleidoscope reveal that space, once thought to be isotropic, is actually continuously expanding, unfolding, and rearranging in a series of freaky patterns,” said astronomer Douglas Stetler, head of the Space Kaleidoscope Science Institute in Baltimore. “It’s an [...]

The Hyper-Sub
Fast boats need to be light, but subs, of course, need negative buoyancy.
The ballast systems in most submarines can displace only about 20 percent of the cabin’s volume, but the Hyper-Sub’s ballast chambers double the volume of the cabin. The boat uses a high-pressure pumping system to rapidly fill these chambers with water or [...]