https://www.military.com/daily-news/2018/10/25/partial-engine-failure-likely-prompted-b-2-emergency-landing-audio.html

Partial Engine Failure Likely Prompted B-2 Emergency Landing: Audio

https://cen.acs.org/materials/photonics/Metamaterials-allow-researchers-shrink-synchrotron/96/i43

Metamaterials allow researchers to shrink a synchrotron onto a chip