272 00:22:38,840 --&amp;gt; 00:22:42,080 One day, Albert Einstein 273 00:22:42,080 --&amp;gt; 00:22:45,880 asked his friend, Niels Bohr, a Danish physicist, 274 00:22:45,880 --&amp;gt; 00:22:50,720 "Do you really believe the moon is not there, when nobody looks?" 