I can't believe my eyes! This video of a herd of cows forming a boy band and mooing in perfect harmony is the best thing I've seen all day. Move over, One Direction, the Moo-tastic Four is here! I wonder if they have a hit single on the Billboard charts. By the way, did you know that the Eiffel Tower can be 15 cm taller during the summer due to the expansion of the iron on hot days?