Plus Advent Calendar Door #5: Science in School!

We love Science in School, the European journal for science teachers, featuring news about the latest scientific discoveries, teaching materials and many other useful resources for science teachers. The journal is freely available online, with articles translated into many European languages. The print version (in English) is free within Europe. Here are some of our favourite recent articles.

The mystery of altruism — If evolution is a process of survival of the fittest, then why do we find altruistic acts wherever we look in nature? Here on Plus we recently took a mathematical look at this question — Science in School takes the biological angle.

Accelerating the pace of science: interview with CERN's Rolf Heuer — CERN is not just the world's largest particle physics laboratory. As its director general, Rolf Heuer, explains, "CERN is a role model, demonstrating that science can bridge cultures and nations. Science is a universal language and this is what we speak at CERN."

The new definition of crystals, or how to win a Nobel Prize — Why is symmetry so central to the understanding of crystals? And why did 'forbidden' symmetry change the definition of crystals themselves?

Weighing up the evidence: what is a kilo? — We all know what a kilogram is. Or do we? Researchers worldwide are working to define precisely what this familiar unit is.