Abstract: Autonomous underwater vehicles (AUV) play an important role in the process of human exploration of the ocean. However, the existing AUV control methods are faced with the problem of ...

Ariana Grande showed off hair transformation after hair transformation as she hosted Saturday Night Live on December 20. The "7 Rings" singer looked almost unrecognizable while channeling Kevin ...

Sunday, Dec. 21 is the winter solstice, marking the shortest day and longest night of the year. Long before modern science explained the phenomenon, ancient cultures recognized the solstice as a ...

Yes the darkest day of the year is here, but that means brighter days are ahead. Sunday is the shortest day of the year north of the equator, where the solstice marks the start of astronomical winter.