Australian Feliks Zemdegs, 19, has taken the Rubik's Cube world title for the second straight time at the 2015 World Championship finals, completing the challenge with a staggering average of 7.56 seconds and best score of 5.695 seconds, narrowly missing the world record of 5.25 seconds held by American Collin Burns.

"The competition was really, really awesome (and) well run. The venue was really nice; all the people were really nice," Zemdegs said. "The win was also really nice, as well. Because I won last time, I was less nervous this time because I had already won one, so that helped a bit."

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Waymo autonomous vehicles operate across 65 square miles inside I-285 and have been involved in six incidents with Atlanta Public School buses since May. Waymo issued a recall because of their cars briefly stopping or slowing down before continuing forward while a bus was stopped and flashing its lights. (Courtesy of Atlanta Public Schools)

Credit: Courtesy of Atlanta Public Schools