Science

New bus runs on human waste
It's not hard to imagine the Bath Bus Company's newest power source prompting jokes. But the firm is touting the renewable benefits of the project, wrapping the Bio-Bus in a graphic cartoon that shows a row of people sitting on toilets.
It is the nearest and most dominant object in our night sky, and has inspired artists, astronauts and astronomers. But fundamental questions remain about our only natural satellite. Where does the Moon come from?