Life is complex. The way a living system works can be described in a series of increasingly refined models, each fleshing out details of the previous model. Typically, description at one level raises questions about what is happening at the finer level. These questions induce hypotheses which drive experimental work which produces ever more detailed knowledge.A paper about memory, just published, is an example of one incremental step in this process. In short, this research works out some of the fine detail at the molecular level for the process of forming visual memories. Continue reading New Research on How Visual Memory Works
Good question … what IS in the air?The simple answer is that the air … the Earth’s atmosphere … is about 78% nitrogen, 21% oxygen, with a tiny amount of some other gases including water vapor. Then, there’s dirt. I want to talk a little about the oxygen, one of the other gases (carbon dioxide to be exact), the water vapor, and the dirt. Continue reading What’s in the air?
According to one of the leading experts on the human circulatory system, blood flowing through veins is blue. Continue reading Is Blood Ever Blue? Science Teachers Want to Know!
Photosynthesis; This is how the British to it (teaching, not photosynthesis).
(Includes footage of a stuffed octopus)