The two ways to measure how fast the universe is growing do not agree

Edwin Hubble in his natural habitat ONE of the most basic facts about the universe is that it is expanding. This observation, made by Edwin Hubble (pictured) in 1929, leads to all sorts of mind-stretching ideas. That the universe is growing implies it was smaller in the past--possibly a lot smaller. Which leads to the thought that a "Big Bang" kicked everything off. It also opens the question of whether the universe will expand for ever, or will eventually see its expansion halted and reversed b...