The habitat of one of the world’s cutest endangered animals is being threatened by human-caused climate change. The Caspian seal is the only marine mammal found in the 143,200-square-mile Caspian Sea.

It’s that time of year again: PEOPLE magazine is on the search for the World’s Cutest Dog. The magazine has partnered with Pedigree for the eighth year in a row. Entries are open most of the month, ...