 Brown hillsides and slivers of snow -- a common sight across Europes Alps, and a far cry from the winter wonderland tourists had banked on.While some snow started to fall again early this week, Europe has seen extreme warm winter weather in recent days, experts say, with 2023 already posting record January temperatures across the region.From Austria to France, Italy and Switzerland, slopes have melted away -- with temperatures too high even to make artificial snow.Many lower-lying resorts ha... 