2022.10.26 Dr Karl Kruszelnicki (Best known as Dr Karl) Australian science communicator and populariser. 1) The biggest ever event/explosion in the Universe was the Big Bang. The second is/are Gamma Ray Bursters (when stars die/collide and send some of the energy of the explosion in a thin concentrated beam. One exploded 2 billion light years away – and wrecked radio communications in the upper atmosphere for a few moments.2) We have worked out why some people are very very attractive to mosquitos. 3) Diet to fight arthritis