The discovery of methane dunes on Pluto is an indication of another way in which this planet mimics Earth, but in a way that is utterly unique and alien.
New research suggests that globular clusters - once thought to be nearly as old as the universe itself - aren't that old, after all. They might be only around 9 billion years old.
We dream of the day that your direct sponsorship will create for you an ad-free website. With your help, as an interim step, we want to offer the option of an ad-free newsletter in the second half of 2018.
Shelf cloud bringing rain on Ormond Beach, Florida, on June 1. Rita Addison wrote: "I watched it move over us, taking many pictures in stages. So excited ... wanted to share." Thanks, Rita!
