Here’s the at home test, push a plastic cup that’s upside down into water.  Gravity working on the mass of the displaced water is trying to push the cup back up, that’s buoyancy.  Simple enough, and there is a wealth of places to do this, wells, ponds, lakes, standpipes, water heaters, anywhere that gravity can […]

Ali Vanderveld, a post-doctoral cosmologist at the Jet Propulsion Lab and her colleagues recently published a paper in the journal Physical Review looking at how giant holes in our “Swiss-cheese-like” universe might make space look as if it’s accelerating when it’s really not. Whew, I have been waiting for something to make more sense than […]