The findings flip the long-held belief that dogs wag their tails when happy and instead suggest tail wags made people happy, so we selected for the trait.

The sanctions block access to U.S. property and bank accounts and prevent the targeted people and companies from doing business with Americans.

Subfreezing conditions and treacherous roadways have contributed to dozens of deaths this month across the U.S., where states as far south as Texas and Florida remain gripped by deadly arctic weather Sunday