This video is about how little we know about the behavior of gravity at short length and distance scales and constraints on Newton's inverse square law at the human and microscopic and atomic scales. Only on solar system scales or larger do we have good constraints on Newton's law of gravitation.
What it took to collect these 54-million-year-old photons from a supermassive black hole
Researchers from MIT have flown a plane without moving parts for the first time. It is powered by an ‘ion drive’ which uses high powered electrodes to ionise and accelerate air particles, creating an ‘ionic wind’.