Flight 19 was the designation of five TBM Avenger torpedo bombers that disappeared on December 5, 1945, during a United States Navy-authorized overwater navigation training flight from Naval Air Station Fort Lauderdale, Florida. The assignment was called “Navigation problem No. 1”, a combination of bombing and navigation, which other flights had or were scheduled to undertake that day.
The Mary Celeste was a brigantine merchant ship notably discovered in December 1872 in the Atlantic Ocean unmanned and apparently abandoned, despite the fact that the weather was fine and her crew had been experienced and able seamen. The Mary Celeste was in seaworthy condition and still under sail heading towards the Strait of Gibraltar. She had been at sea for a month and had over six months’ worth of food and water on board. Her cargo was virtually untouched and the personal belongings of passengers and crew were still in place, including valuables. The crew was never seen or heard from again. Their disappearance is often cited as the greatest maritime mystery of all time.
The Hum is a generic name for a series of phenomena involving a persistent and invasive low-frequency humming noise not audible to all people. Hums have been reported in various geographical locations. In some cases a source has been located. A Hum on the Big Island of Hawaii, typically related to volcanic action, is heard in locations dozens of miles apart. The local Hawaiians also say the Hum is most often heard by men. The Hum is most often described as sounding somewhat like a distant idling diesel engine. Typically the Hum is difficult to detect with microphones, and its source and nature are hard to localize.
The Hum is sometimes prefixed with the name of a locality where the problem has been particularly publicized: e.g., the “Bristol Hum”, the “Taos Hum” or the “Bondi Hum”.
The Nibiru collision is a supposed encounter between the Earth and a large planetary object (either a collision or a near-miss) which certain groups believe will take place in the early 21st century. Believers in this doomsday event usually refer to this object as Planet X or Nibiru.
The idea was first proposed in 1995 by Nancy Lieder, founder of the website ZetaTalk. Lieder describes herself as a contactee with the ability to receive messages from extra-terrestrials from the Zeta Reticuli star system through an implant in her brain. She states that she was chosen to warn mankind that the object would sweep through the inner Solar System in May 2003, later revised to around 2010, causing Earth to undergo a pole shift that would destroy most of humanity. The predicted collision has subsequently spread beyond Lieder’s website and has been embraced by numerous internet doomsday groups, most of which link the event to the 2012 phenomenon. Although the name “Nibiru” is derived from the works of ancient astronaut writer Zecharia Sitchin and his interpretations of Babylonian and Sumerian mythology, Sitchin himself denies any connection between his work and claims of a coming apocalypse.
The Tunguska Event, or Tunguska explosion, was a powerful explosion that occurred over the Southern swamp, a small morass not far from the Podkamennaya (Lower Stony) Tunguska River in what is now Krasnoyarsk Krai in Russia, at 0 hours 13 minutes 35 seconds Greenwich Mean Time (around 7:14 a.m. local time) on June 30, 1908 (June 17 in the Julian calendar, in use locally at the time).
Although the cause of the explosion is the subject of debate, it is commonly believed to have been caused by the air burst of a large meteoroid or comet fragment at an altitude of 5–10 kilometres (3.1–6.2 mi) above the Earth’s surface. Different studies have yielded varying estimates of the object’s size, with general agreement that it was a few tens of metres across.
