The world record for the men’s 400m is 43.03 seconds, clocked in the 2016 Olympics. #Puzzle 54.2 One of the smallest known organisms is a bacterium called Pelagibacter ubique, with an average cell diameter of 120 to 200 nanometres. Mailbox: Last week’s solvers #Puzzle 53.1 #Puzzle 53.1 Hi Kabir, The cards in order from left to right are: King of …
