Swans on Tea

C is for Carbon, parts 1 and 2, over at Cocktail Party Physics
An interview with Eric Roston, author of The Carbon Age: How Life’s Core Element Has Become Civilization’s Greatest Threats
C is for cookie. That’s good enough for me.

The gallery of failed atomic models, 1903-1913 from Skulls in the Stars.
[H]ow many atomic models were there?
A lot. Most people in physics are taught Thomson’s ‘plum pudding’ model of the atom, but a little investigating turned up no less than eight distinct pictures of atomic structure.
The late 1800s and early 1900s was the breakthrough period [...]

Bought this trebuchet as a kit several years ago, and put it together over the Memorial day weekend back then. I had seen a NOVA special about some men who built two using in-period tools, and then knocked down a wall with them. When I ran across the kits on the intertubes, I [...]