WHO emphasizes the illness is an 'undiagnosed disease' rather than an unknown one.
The story of D.B. Cooper is largely considered one of the great unsolved mysteries in FBI history.
Carving represents only the second figurative animal depiction from this period found in the region, indicating early symbolic behavior by prehistoric humans.
Researchers report an unknown process transports nitrogen to high altitudes, making blue aurora a mystery.
The disease primarily affects young people aged 15 to 18, putting the government on 'maximum alert'.
Authorities suspect the red hue is caused by hydraulic dye used by plumbers to detect leaks.
Richard III has long been suspected of having had his nephews murdered, with prevailing theories blaming him for their disappearance.
The spade-toothed whale has never been seen alive, and scientists know almost nothing about the species.
Experts explain the lights are lens flare, but online users remain skeptical.
These breakthroughs were reported in two separate studies submitted for publication in scientific journals.