Dark Matter: Scientists estimate that dark matter constitutes about 85% of the universe's mass, yet its exact nature remains elusive
Quantum Entanglement: This phenomenon describes particles that become correlated to the point where their states are interconnected, even when separated by vast distances.
Placebo Effect: The placebo effect occurs when patients experience real improvements in their condition after receiving a treatment that has no therapeutic effect.
Ball Lightning: Rare and unexplained, ball lightning appears as glowing spheres during thunderstorms and behaves in ways that defy current scientific understanding.
Sleep: While essential for health, the exact reasons and mechanisms behind sleep remain a mystery, particularly why all animals, including humans, need to sleep.
Tardigrades (Water Bears): These microscopic creatures can survive extreme conditions, including space, radiation, and deep-sea pressures, challenging traditional biological limits.
Human Consciousness: Understanding how consciousness arises from the physical brain remains one of neuroscience's greatest challenges.