This week in science

NASA's electric plane and more: Understand the world through 9 images

NASA/Goddard/University of Arizona

The week of May 6–12, NASA took another step toward the future of aviation, while a sample from the ancient past began its journey to Earth.

Here are the biggest science stories of the week told through 9 extraordinary images.

Michael Hanson and Bhart-Anjan S. Bhullar