Background Predicting progression to aortic valve replacement (AVR) in moderate aortic stenosis (AS) is challenging. This ...

Discover how to build a multi-stage water siphoning and vortex device using repurposed plastic bottles and simple household items. Watch water flow through homemade channels as captivating vortices ...

Late last year, astronomers detected the sixth known dark vortex on Neptune. This time, however, scientists were able to chronicle the formation of this swirling storm over the course of several years ...