Pensée is a French word that means thought or ideas. Immanuel Velikovsky was a philosopher and scientist who lived in the early 1900s. He suggested that the Earth had experienced drastic climate changes in the past, such as floods and storms, which led to the rise and fall of some civilizations. He also said that different planets had collided with each other in the past, which caused huge catastrophes on Earth. People have been reconsidering Velikovsky's ideas recently, thinking about whether they are true or not. They are studying things like ancient texts and archaeological artifacts to see if the clues left behind match up with Velikovsky's ideas. So, in short, pensée is just a way of talking about ideas or thoughts, and Immanuel Velikovsky was a scientist whose ideas are being reconsidered today to help us better understand our past.