Cryo-electron tomography (also cryo-ET or electron cryotomography) is a technique where an electron microscope is used to record a series of two-dimensional images as a biological sample held at ...

Cognitive behavioral therapy (CBT) is a form of psychotherapy that focuses on modifying dysfunctional emotions, behaviors, and thoughts by interrogating and uprooting negative or irrational beliefs.

Tornadoes are vertical funnels of rapidly spinning air. Their winds may top 250 miles an hour and can clear a pathway a mile wide and 50 miles long. Twisters are born in thunderstorms and are often ...