Researchers found a supermassive black hole choking on its meal

Greedy!

Moving and levitating objects using sound waves

Water droplets, coffee granules, fragments of polystyrene and even a toothpick – all of these, and more, have been levitating and moving around in a Swiss laboratory lately; all of them lifted by sound waves, that is. This is the first time a device is capable of handling several objects simultaneously. This achievement was detailed in a paper published in