I've not discarded my old university notebooks, as I cannot forget the glorious days of my post graduate studies. It looks as if I'll never get back those golden days, when only knowledge and discovery mattered and nothing else. Today, I opened one of those notebooks. The funny thing is a few of these notebooks are a collage of lectures of different subjects. There is no continuity in the notes. In the first few pages, it lists the following types of volcanic rocks: Andesite, Apanitic, and Basalt Next, it lists the texture: Glassy, Vesicles, Porphry, Pegmatite, Plutonic rocks, Phaneritic, Gabbro, Ultramafic Diorite, Granite, Rhyolite, Obsidian, Country or Wall Rock, Concordant, Pipes and Necks, Dykes and Sills, Laccolith, Lopoliths, Stock and Batholith, Extrusive, Chilled Margins, Xenoloiths, Clastic sediments A brief note on sting rays is written in pencil. This is followed by pictures and descriptions of the following animals: Sardine, Echeinesis, Cynoglossus , Mullet (there ...