Do You Know? 1. Could there be materials on other planets that we do not have on Earth? 2. We know that photosynthesis (using sunlight to make food) occurs in plants. Can an animal photosynthesise as well? 3. We speak of "five senses", but is there a scientific notion of senses, and how many there are? 4. Can we build a ship made of ice? 5. I read about large amount of plastic waste found in oceans, but how does plastic get into the ocean?