Earlier this year, scientists proposed that one of NASA's spacecraft — the Wide-field Infrared Survey Explorer, or WISE — may have discovered signals that could indicate the presence of megastructures used to harvest the energy of stars. These so-called "Dyson spheres" would be a sign of highly advanced civilizations capable of making major changes to their planetary systems.
Yet, not everyone was sold on these detections, and a scientist working with WISE (the spacecraft was renamed "NEOWISE" in 2013) is determined to set the record straight. He suggests the signals are far likelier to represent dusty galaxies with shrouded and ravenous black holes that are colorfully named "Hot DOGs."
