"An image goes around the world and brings out emotion. It is shared," he said. "Europe is a group of principles, of values which oblige us to welcome those who are pushed out and look for refuge because they are persecuted." He said some of the 4 million displaced people in Syria have been "welcomed by neighboring countries that are themselves suffering."

ill, he said, choosing happiness or leisure over earning is challenging, in part because accumulation of money — or candy — is easier to measure than, say, happiness. “You can count Hershey’s Kisses,” Dr. Norton said. Being an involved parent or partner is not so quantifiable. “Most of the things that truly make us happy in life are harder to count,” he said.

mber is the 48th example of a rare class of primes called Mersenne Primes. Mersenne primes take the form of 2 raised to the power of a prime number minus 1. Since they were first described by French monk Marin Mersenne 350 years ago, only 48 of these elusive numbers have been found