General
Here are posts of general interest to me.
Photo-Micrography Competition
Shown is a chick embryo at 6X, from the University of Lisbon. There are approximately 230 entries.
The Shifting Poles
"Polarity reversals have occurred hundreds of times at irregular intervals throughout the planet’s history – most recently about 780,000 years ago – but scientists are still trying to understand how and why." Link