Supercell and tornado in the Great Plains, including a wall cloud, now known as a murus cloud. Credit: Shutterstock/Minerva Studio It's time for you to look up at the sky more often. If you did ...

For many, David Mitchell's 2004 novel Cloud Atlas, a 544-page metafiction epic spanning thousands of years and almost as many genres, would be the definition of unfilmable. Do you have questions ...