It's pretty awesome to see an actual neuron and be able to identify it's components A neuron from the hippocampus at magnification. There are approximately 100 billion neurons in the human brain. Image by Dr. Carlo Sala, CNR Institute of Neuroscience
"Bird Song and the Problem of Honest Communication" How is the honesty of animal signals maintained when exaggeration and bluff are so tempting? Female song sparrows respond preferentially to larger song repertoires. Read more: http://www.americanscientist.org/issues/feature/2008/2/bird-song-and-the-problem-of-honest-communication March & April 2008, art by Barbara Aulicino.