Death Valley, one of the hottest places on Earth, is currently a riot of color: More than 20 different kinds of desert wildflowers are in bloom there after record-breaking rains last October. It's the best bloom there since 2005, according to Abby Wines, a spokeswoman for Death Valley National Park, and "it just keeps getting better and better." The flowers started poking up in November, but the particularly colorful display emerged late last month in the park, which is mainly in California but stretches across the Nevada border. On Twitter and Instagram, park visitors have taken to calling it a...