The researchers looked at cells from specific layers of the brain's outer shell, the cerebral cortex. (scientificamerican.com)
There are three specific layering pieces you're going to want for this fall. (northwestblonde.com)
Researchers linked dated graffiti about droughts in a cave in China to physical evidence in the cave of the water shortages, such as changes in ratios of stable isotopes in specific layers of stalagmites (scientificamerican.com)