Science
Space Mysteries Quiz
Dark matter, the Fermi Paradox, and the questions that keep astronomers awake at night.
Dark matter, the Fermi Paradox, and the questions that keep astronomers awake at night.
95% of the universe is made up of dark matter and dark energy — invisible substances that science has detected but cannot yet explain. From the information paradox inside black holes to the eerie silence of the Fermi Paradox, the cosmos is full of unsolved puzzles that challenge everything we think we know about reality.
Each round presents 10 multiple-choice questions. Pick your answer, get instant feedback with a detailed explanation, and see your final score at the end. No signup or timer — just you and the cosmos.
Questions span the biggest unsolved problems in astrophysics and cosmology — from dark matter and dark energy to the nature of black hole singularities. You'll explore the Fermi Paradox and its proposed solutions, the multiverse hypothesis, fast radio bursts, the famous WOW! Signal, and the matter-antimatter asymmetry that allowed the universe to exist at all.
Nobody knows for certain. Dark matter makes up about 27% of the universe and was first inferred from the way galaxies rotate faster than visible matter alone can explain. Leading candidates include Weakly Interacting Massive Particles (WIMPs) and axions, but despite decades of experiments, no dark matter particle has been directly detected.
This is the heart of the Fermi Paradox. With 100 to 400 billion stars in the Milky Way alone and trillions of galaxies in the observable universe, the odds seem to favor life existing elsewhere. Yet we have found no confirmed evidence of extraterrestrial intelligence — a contradiction that has spawned dozens of proposed solutions, from the Great Filter to the Zoo Hypothesis.
General relativity predicts a singularity — a point of infinite density where the known laws of physics break down. However, many physicists believe a complete theory of quantum gravity will replace the singularity with something less extreme. The black hole information paradox, highlighted by Stephen Hawking, asks whether information that falls in is truly lost forever, and remains one of the deepest open questions in physics.
Last updated: March 2026