Bridges That Build Themselves

Bridges That Build Themselves

Bridges That Build Themselves The two oldest types of bridge are the arch bridge and the corbel bridge.  It takes a lot of time and effort to build them, but they can last for thousands of years…
Healthier Pizza in Lunch Lady Land

Healthier Pizza in Lunch Lady Land

Big news, school lunch eaters - your rectangle-shaped pizza will soon be burned and served up cold1 with less sodium! Schwan's Food Service, based in the lovely state of Minnesota, is ahead of…
Among My Souvenirs (chem.)

Among My Souvenirs (chem.)

I expect most of you have heard this song, with its sad words.  It’s full of letters sad and blue, a photograph or two, roses, tokens …. Not for me!  But as I am clearing out our chemical…
Bora makes a farewell to Scienceblogs

Bora makes a farewell to Scienceblogs

Scienceblogs.com stalwart Bora Zivkovic has bid farewell to that site, the latest in a series of defections they hyper-dramatize as a 'diaspora' due to recent events, but he says it isn't about…
Kid Science Fun: Security Gunk

Kid Science Fun: Security Gunk

I was relaxing out back, watching fireflies flash, when a buddy, dad to boy and girl 11 year old twins, called to catch up with news and relate a funny (still unfinished) story. Growing crankier by…
Collatz sequences

Collatz sequences

I am playing with Coq and Isabelle now :) Formalizing the following: fun p(a) = if (p(a) % 2 = 0) then (p(a div 2)) else (a).The greatest divisor of a, which is power of two = p(a). I want to show…
Jakobshavn Glacier Second Calving ?

Jakobshavn Glacier Second Calving ?

Jakobshavn Glacier Second Calving ?The calving front of Jakobshavn glacier has retreated dramatically since about 1850, to the point that the two main outflow ice streams can be seen as separate…