The rise of 'quantum gravity?' Einstein's theory seen in the quantum realm for 1st time

Scientists have spotted the first hints that Albert Einstein's formulation of gravity operates in the quantum realm. The hints have to do with observations of a falling quantum object, and though this may not seem like a huge deal (literally, we are talking about atoms here), it could be an important step on the road to a theory of ... everything.To start, we have to go back to the early years of the 20th century. Consider Einstein's iconic theory of gravity, general relativity, and the elusive