So I have started on the free learning at Coursera already and it is very interesting to know that when you learn, there are many activities in the synapses in your brains. If you look at the picture before, post learning creates more synapses. I thought that it would actually activate synapses already in the brains and not create new ones. This means that every time we learn, we are making our brains more active. No wonder people always say one should always be mentally active even when we are old just so that our brains will continue to grow.