FILE – Reindeer in a corral at Lappeasuando near Kiruna, Sweden, await to be released onto the winter pastures on Nov. 30. 2019. Finding food in a cold, barren landscape is challenging, but researchers from Dartmouth College in New Hampshire and the University of St. Andrews in Scotland report that reindeer eyes may have evolved to allow them to easily spot their preferred meal. (AP Photo/Malin Moberg, File)