We have tried and tested the best air purifiers to help shield your home from pollen, pet dander, smoke, dust and other airborne pollutants — these are the appliances to buy ahead of Black Friday.

Fresh Air from WHYY, the Peabody Award-winning weekday magazine of contemporary arts and issues, is one of public radio's most popular programs. Hosted by Terry Gross and Tonya Mosley, the show ...

Nov. 13, 2025 Arctic sea ice is disappearing fast, and scientists have turned to an unexpected cosmic clue—space dust—to uncover how ice has changed over tens of thousands of years. By tracking helium ...

Abstract: Permanent magnet synchronous motors (PMSMs) used in compressors operate under wide load fluctuations and speed variations, resulting in significant internal current changes and strong mutual ...