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Greg Laden's Blog

Evolution, Life Sciences, Science Education, Human Evolution, and Stuff

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My name is Greg Laden. You can find out about me here, contact me here, and for all the gory details, have a look at this...

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Cell Biology:

How brains work, how brain imaging works: Astrocytes

Blood flow in the brain is linked to neuronal activity. Therefore, various 'brain scanning' techniques can be used to observe neuronal activity in the brain. This has led to an astonishing revolution in knowledge of how the brain works. Of course, you knew that already....

New Research on How Visual Memory Works

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...

What's in the air?

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...

Is Blood Ever Blue? Science Teachers Want to Know!

According to one of the leading experts on the human circulatory system, blood flowing through veins is blue....

The quality of YouTube biology projects is going up

Photosynthesis Video

Photosynthesis; This is how the British to it (teaching, not photosynthesis). From Crackle: Biology Education - Photosynthesis for GCSE / K12 ......

AP Biology Gene Therapy Expose

(Includes footage of a stuffed octopus)...

Two Cell Level Animations

are here: HIV infection at Wissen schafft Kommunikatioin Other cellular stuff (an oldie but a goodie) at WeiterGen!...

Fight Club Mitosis

Mitosis Interpretive Dance and Rap

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