Scientists are increasingly investigating the interplay between quantum mechanics and general relativity, particularly in regimes of strong gravity. A new study by Sobrero from the Centro Brasileiro de Pesquisas Físicas (CBPF), alongside Abrahão and Guerreiro from the Department of Physics, Pontifical Catholic University of Rio de Janeiro, re-examines a thought experiment concerning superluminal communication and the potential for violating fundamental physical principles. Their work demonstrates that fluctuations within gravitational fields prevent such signalling, revealing a crucial link between the quantization of gravitational radiation and the consistency of general relativity even when gravity is strong. This finding suggests that quantum effects are not merely…