/f/todayilearned
TIL beneath the Puerto Rico Trench is a mass so dense it has a gravitational pull on the surface of the ocean, causing it to dip somewhat. The Trench is also associated with the most negative gravity anomaly on earth, -380 milliGal, which indicates the presence of an active downward force.
en.wikipedia.orgSubmitted by Muted_Pomegranate738 t3_11mv7iw
TIL Jason Everman, former Army Ranger and Green Beret, was Nirvana's original second guitarist and can even be seen on the Bleach cover, although he doesn't perform on the album. He later briefly joined Soundgarden as Hiro Yamamato's successor on bass.
en.wikipedia.orgSubmitted by Chrahhh t3_11m3jm3
TIL of castaway huts (or depots) which are deliberately placed on isolated islands by governments. They contain supplies and tools which can help people who become stranded there. Most were built by the New Zealand government in the 19th and 20th centuries.
en.wikipedia.orgSubmitted by bermuda__ t3_11mdmt7
TIL The prototype of the Rolls Royce Ghost was so quiet inside that it made test drivers sick. The engineers had to remove some of the noise-isolating material, and create seats that vibrated at specific frequencies to introduce some noise into the interior.
carbuzz.comSubmitted by Rifletree t3_11m5tai
Submitted by katalina0azul t3_11m4yni
Submitted by ThreadbareAdjustment t3_11m4msi
Submitted by thedubiousstylus t3_11lmnh5
Submitted by Not_that_wire t3_11ljs6g
TIL of the 1991 Downing Street mortar attack, in which IRA members launched three mortars at No. 10 Downing Street during a cabinet meeting, attempting to kill John Major. One hit the lawn 30 yards away, and it is believed that if this mortar had hit the building the entire cabinet would have died.
en.wikipedia.orgSubmitted by a3poify t3_11l698t
TIL that the Convair Model 118, a tentative flying car from 1947, was shelved because its prototype crashed when a test pilot mixed up the flight engine's fuel gauge with the road engine's and didn't see the former run out. While he survived, this killed interest in the project.
en.wikipedia.orgSubmitted by ShabtaiBenOron t3_11jhzes