New state of matter created by stuffing atoms inside an atom
Austria and US-based scientists have created a new exotic state of matter where an electron orbits a nucleus at a great distance, while other atoms are bound inside the orbit. Called "Rydberg polarons", the state was achieved by combining 'Rydberg atoms', which have a single electron lifted into a highly excited state, and 'Bose-Einstein condensates', dense cloud of ultracold atoms.