These mysterious substances make up the majority of the universe's mass-energy content, yet their nature and properties remain unknown.
This region in the western part of the North Atlantic Ocean is known for the unexplained disappearances of ships and airplanes.
A rare phenomenon in which luminous, spherical objects appear during thunderstorms. Its formation and behavior are not fully understood.
The phenomenon where people experience real benefits from treatments that have no active ingredients.
This is a phenomenon where particles become correlated in such a way that the state of one particle cannot be described independently of the state of the other, no matter how far apart they are.
A medieval book written in an unknown script and language. Despite extensive efforts, linguists and cryptographers have been unable to decipher its meaning.
While theoretically possible according to some interpretations of physics, achieving faster-than-light travel remains beyond our current technological capabilities and understanding.
A strong, narrowband radio signal detected by astronomer Jerry R. Ehman in 1977. Despite extensive searches, the source of this signal has not been identified.
While there are various theories, the exact mechanism and conditions that led to the emergence of life on Earth remain uncertain.
While the Big Bang Theory provides a framework for understanding the universe's origin, the exact cause and conditions leading up to the Big Bang remain a subject of theoretical and experimental exploration.