Global warming is giving a boost to Sonoran Desert plants that have an edge during cold weather, according to new research. Although the overall numbers of winter annuals have declined since 1982, species that germinate…
Previous studies have suggested that Indonesia’s Toba supervolcano, when it erupted about 74,000 years ago, triggered a 1,000-year episode of ice sheet advance, and also may have produced a short-lived “volcanic winter,” which drastically reduced…