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....
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Posted on June 20, 2008 8:29 AM • 12 Comments •
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...
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Posted on April 25, 2008 10:55 AM • 6 Comments •
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...
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Posted on April 18, 2008 4:08 PM • 7 Comments •
According to one of the leading experts on the human circulatory system, blood flowing through veins is blue....
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Posted on April 5, 2008 5:00 PM • 18 Comments •
Posted on March 18, 2008 11:36 PM • 0 Comments •
Photosynthesis; This is how the British to it (teaching, not photosynthesis). From Crackle: Biology Education - Photosynthesis for GCSE / K12 ......
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Posted on March 11, 2008 8:15 AM • 1 Comments •
(Includes footage of a stuffed octopus)...
Posted on March 9, 2008 11:38 PM • 0 Comments •
are here: HIV infection at Wissen schafft Kommunikatioin Other cellular stuff (an oldie but a goodie) at WeiterGen!...
Posted on February 29, 2008 4:57 PM • 0 Comments •
Posted on February 22, 2008 6:19 PM • 1 Comments •
Posted on February 20, 2008 10:00 AM • 0 Comments •