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...s site is really cool; do I need to be a scientist to help out?===== <!--T:2--> =====How many neurons are in the brain?===== <!--T:4-->

=====How many neurons are in the brain?===== It's estimated that there are 84 billion neurons in the brain.

...[http://forum.eyewire.org/discussion/227/help-what-is-this#Item_39/ here] in the forum. Other EyeWirers will help you figure out what the problem is. Congratulations, you've finished the tutorial! After you finish the lessons in the tutorial, there are several more training tasks that give you a progres