Checking his watch, his time was almost gone. The next lesson was almost around the corner.
"Okay, students! Let me introduce a few fictional elements before I call it a day. You are not expecting to learn all the materials in a single class, right?"
Professor Zinolosky pointed at a new element on the holographic board.
"Unobtanium: Unobtanium has appeared in many fictional works as a go-to name for any rare element or powerful substance. Unobtanium is a high-temperature superconducting metal mined from the planets that have distinctive features of Pandora. It was needed to supply power to spaceships for interstellar travel."