Scientists are building a case for a mission to Neptune, an ice giant that’s only been visited by a spacecraft once. But the window to act is closing.
Vaccines can prevent symptoms, but some can also keep people from spreading infection. That’s critical, and no one knows if the new vaccines do it….
Catch up on the most important updates from this week….
Just how much material did OSIRIS-REx collect from Bennu? The method relies on something called the moment of inertia, and you can replicate it with a fan and a penny….