Polyhedra and the Media - On the new polyhedra of Schein and Gayed, and mathematical journalism.
Science fiction and quantum mechanics on Rudy Rucker's blog.
Trigonometric Delights. This book is neither a textbook of trigonometry—of which there are many—nor a comprehensive history of the subject, of which there is almost none. It is an attempt to present selected topics in trigonometry from a historic point of view and to show their relevance to other sciences. It grew out of my love affair with the subject, but also out of my frustration at the way it is being taught in our colleges.
Chemistry in its Element - a weekly podcast from the Royal Society of Chemistry offering an engagingly-narrated stroll through the periodic table, element by element.
Physical Review Letters' 50th anniversary retrospective promises to be an interesting survey of the physics landscape for the past half-century.
Science and Pseudoscience - a 1973 lecture from Imre Lakatos.
Can you cut a hole in a 3x5 card that's large enough to crawl through? Topological trickery and some other classic science experiments.
The scientific tradition in Africa. An interview with Thebe Medupe, a South African astronomer.