Newslink: Astronaut Brains, the Great Pyramid and Water Bears: The Week's Top Space Stories

Astronauts' brains change during spaceflight and the Great Pyramid of Egypt harbors a void that researchers discovered using cosmic rays. Here are the most interesting things that happened in the universe this week.

https://www.space.com/36316-the-most-amazing-space-stories-of-the-week.html