[{"n": "Dark matter", "u": "/e/cosmic-mysteries/dark-matter/", "s": "Invisible matter inferred from gravitational effects on cosmic scales."}, {"n": "Dark energy", "u": "/e/cosmic-mysteries/dark-energy/", "s": "The mysterious force accelerating the universe's expansion"}, {"n": "Fast radio bursts", "u": "/e/cosmic-mysteries/fast-radio-bursts/", "s": "Transient radio bursts of high-energy astrophysical origin, not yet fully understood."}, {"n": "The Wow! signal", "u": "/e/cosmic-mysteries/the-wow-signal/", "s": "A 72-second radio anomaly that remains unexplained."}, {"n": "Tabby's Star", "u": "/e/cosmic-mysteries/tabby-s-star/", "s": "A binary star with mysterious dimming events, possibly caused by an orphaned exomoon."}, {"n": "Oumuamua", "u": "/e/cosmic-mysteries/oumuamua/", "s": "The first confirmed interstellar object to pass through the Solar System."}, {"n": "The Fermi paradox", "u": "/e/cosmic-mysteries/the-fermi-paradox/", "s": "A paradox questioning the absence of extraterrestrial evidence."}, {"n": "The Drake equation", "u": "/e/cosmic-mysteries/the-drake-equation/", "s": "Probabilistic argument estimating communicative extraterrestrial civilizations in the Milky Way."}, {"n": "The Great Filter", "u": "/e/cosmic-mysteries/the-great-filter/", "s": "Hypothesis that an improbable step limits detectable extraterrestrial civilizations."}, {"n": "SETI", "u": "/e/cosmic-mysteries/seti/", "s": "Exploring, understanding, and explaining the origin and nature of life in the universe."}, {"n": "Black holes", "u": "/e/cosmic-mysteries/black-holes/", "s": "An astronomical body whose gravity prevents anything, including light, from escaping."}, {"n": "Sagittarius A*", "u": "/e/cosmic-mysteries/sagittarius-a/", "s": "Supermassive black hole at the center of the Milky Way."}, {"n": "Gamma-ray bursts", "u": "/e/cosmic-mysteries/gamma-ray-bursts/", "s": "Extremely energetic explosions in distant galaxies."}, {"n": "The Great Attractor", "u": "/e/cosmic-mysteries/the-great-attractor/", "s": "A gravitational anomaly drawing galaxies toward the Norma region."}, {"n": "The cosmic microwave background", "u": "/e/cosmic-mysteries/the-cosmic-microwave-background/", "s": "Relic radiation from the early universe."}, {"n": "Neutron stars", "u": "/e/cosmic-mysteries/neutron-stars/", "s": "Gravitationally collapsed cores of massive stars, second only to black holes."}, {"n": "Magnetars", "u": "/e/cosmic-mysteries/magnetars/", "s": "Neutron stars with the most powerful magnetic fields in the universe."}, {"n": "The heat death of the universe", "u": "/e/cosmic-mysteries/the-heat-death-of-the-universe/", "s": "Hypothesis that the universe will reach maximum entropy."}, {"n": "The Roswell incident", "u": "/e/cosmic-mysteries/the-roswell-incident/", "s": "In 1947, a rancher near Roswell, New Mexico, discovered debris scattered across his land, including tinfoil, r"}, {"n": "The Phoenix Lights", "u": "/e/cosmic-mysteries/the-phoenix-lights/", "s": "Widely sighted UFO event later attributed to military aircraft and flares."}, {"n": "Area 51", "u": "/e/cosmic-mysteries/area-51/", "s": "Classified USAF facility central to experimental aircraft testing and UFO lore."}, {"n": "The Rendlesham Forest incident", "u": "/e/cosmic-mysteries/the-rendlesham-forest-incident/", "s": "A series of UFO sightings near a US air base in England."}]