› added 4 years ago

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TIL: There's a skyscraper with a Ferris wheel built in. The first-of-its-kind ride is mounted over 300 feet above street level. Plans for the project fell through and the building currently stands empty.

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ep0r5 TIL about the Shepard Tone. An audio illusion that creates the feeling of consistent, never-ending rising/falling. The illusion is achieved by playing overlapping notes that are one octave apart. In this way, the sensation of rising or descending notes never ends.
LkX5V TIL it is estimated 70% of children with an egg allergy will outgrow it by age sixteen.
XwMX TIL that, during the Korean war, American soldiers gave the codename “Tootsie Rolls” to 60MM mortar ammo, ana in one occasion they were accidentally sent crates full of candy after their request for more ammo
rRK40 TIL The earliest known life-forms on Earth are fossilised micro-organisms, found in hydrothermal vent precipitates (holes in the sea floor). They date to between 3.77 billion and 4.28 billion years ago.
nXd TIL that humans can reliably identify, by smell, blood relatives - but not husbands or wives. Preadolescent children can detect their full siblings but not half-siblings or step-siblings.