A short stretch of highway in Arizona counts off exit numbers, road signs and markers in kilometers due to a push in the 80's to convert the country's measurement system to metric. gizmodo.com/an-arizona-hi…
Saltwater crocodiles sometimes venture into open ocean, can travel hundreds of kilometers in a matter of days using ocean currents, and can spend so long in the ocean that barnacles begin to grow on their scales. en.wikipedia.org/wiki/Sal…
The Dingo Fence is a 5,614 kilometer fence built in Australia during the 1880s to keep dingoes out of the relatively fertile south-east part of the continent to protect the sheep flocks of southern Queensland. It is one of the longest structures in the world. en.wikipedia.org/wiki/Din…
The highest point (Mount Whitney at 14,494 feet (4,418 meters) above sea level) and lowest point( Badwater Basin at 282 feet (86 meters) below sea level) in the Contiguous US are only 88 (142 kilometers) miles apart. howderfamily.com/blog/dea…
There have been documented cases of people committing murders while sleepwalking. In one case a man named Kenneth Parker managed to drive 20 kilometers to his in-laws house and murdered his mother-in-law all while sleepwalking. He immediately turned himself in and was later acquitted. en.wikipedia.org/wiki/Hom…
The Fibonacci numbers (1,1,2,3,5,8....) can be used to approximately convert miles to kilometers. 2 mi β‰ˆ 3 km, 3 mi β‰ˆ 5 km, etc. catonmat.net/fibonacci-mi…
The asteroid belt is no where near as crowed as portrayed in movies and on TV. There are millions of kilometers between each object and astronauts would probably not even realize they were flying through the belt scientificamerican.com/ar…
Sunspots are optical sinkholes that are about a thousand kilometers lower than the surrounding photosphere. With binoviewers, a good sunspot group in H-Alpha can make it appear like the Sun is going to eat itself inside out starting at the spot ephemeris.sjaa.net/1209/b…
One of the deadliest explosions in history occurred in Beijing in 1626. An unexplained explosion at a gunpowder factory obliterated 4 square kilometers of city and killed around 20,000 people. The blast itself was about as powerful as the nuclear explosion over Hiroshima. en.wikipedia.org/wiki/Wan…
The longest railway in the world is the Yiwu-Madrid railway line. The railway is about 13,000 kilometers long starting in Yiwa, China and ending in Madrid, Spain. en.wikipedia.org/wiki/Yiw…
Today I learned of the existence of Planet J1407b, a planet that has more than 30 rings, each of them being millions of kilometers in diameter. rochester.edu/newscenter/…
Mt Chimborazo of Ecuador is the highest point on Earth, 1.5 miles/2.4 kilometers above Mt Everest. The Earth is an 'oblate spheroid' shape, so the equator bulges out. The mountain sits on top of this bulge so it is the closest point to the moon and outer space. universetoday.com/15025/h…
During the WW2, the Nazis were developing a huge space mirror with 1,5 kilometer diameter, it would've been used as a weapon that could burn cities and boil parts of oceans using the mirror to reflect the sunlight. huffpost.com/entry/nazi-s…
153P/Ikeya–Zhang, A periodic comet that has the longest orbital period of 366.51 years. The tail of the comet is over a billion kilometers or 621 million miles. The comet passed perihelion on March 18, 2002, and is expected to swing by again between 2362–2363. en.wikipedia.org/wiki/153…
150 meters below Naples, Sicily, there is a vast multi-level underground stretching over a half kilometer, containing WWII cars, beds, conveniences, and other war relics. bbc.com/travel/story/2016…
The ISS or the International Space Station at an average altitude of 400 kilometers/248 miles above Earth and circle the globe every 90 minutes at a speed of about 17,500 mph or 28,000 km/h. space.com/amp/16748-inter…
The deepest depths of Lake Erie are still at a higher elevation than the surface of Lake Ontario. The two lakes are only separated by about 21 miles / 34 kilometers. en.wikipedia.org/wiki/Gre…
Biologists found that some dolphins in the Gulf of Mexico decapitate catfish before eating them in order to avoid injury from the catfish skull spines. Biologists studied a sampling of a half-kilometer trail of severed catfish heads bobbing in the wake of a dolphin pod. nationalgeographic.com/ne…
There are more multi-cellular zooplankton per square kilometer in the Chukchi Sea than there are stars in the Milky Way and collectively there are plankton than there are galaxies in the observable universe. chukchiscience.com/scienc…
The sport of lacrosse was originally a form of ceremonial combat played by Native American tribes with teams of 100-1,000 players, on a field several kilometers long, in games that lasted two to three days straight. en.wikipedia.org/wiki/Lac…
In 1907, a Mexican railroad brakeman named JesΓΊs GracΓ­a saved the entire town of Nacozari by singlehandedly driving a damaged and burning train containing dynamite six kilometers away from the town before it finally exploded, killing him. en.wikipedia.org/wiki/Jes…
The Sperm Whale is the loudest animal in the world. They are capable of producing sounds 230 decibels in volume, and can be heard by other Sperm Whales from 60 kilometers away. en.wikipedia.org/wiki/Spe…
The Deepest Point in the Ocean Known to Man is the Challenger Deep which is is 10,924 Meters or 10.92 Kilometers. And there is still life deep down under. epic.cpacamp.com/the-deep…
The eastern most part of Russia and the western most part of USA are separated by just 2.4 miles or 3.8 kilometers. Russia is the closest country to USA which doesn't share a land border. earthobservatory.nasa.gov…
The magnetosphere of Jupiter, extends up to seven million kilometers in the Sun's direction and almost to the orbit of Saturn in the opposite direction. If it was visible from Earth, in the night sky, it would be roughly 4 to 5 times bigger than our moon en.wikipedia.org/wiki/Mag…
The entire surface of Saturn's moon, Titan, can move several kilometers per month, suggesting that there is an ocean underneath the surface. wikipedia.org/wiki/Titan_…
A bottlenose dolphin could swim up to 22 miles per hour(35 kilometers per hour) and when they're asleep, they keep half of its brain awake in order to keep breathing montereybayaquarium.org/a…
The Hawaiian island chain (the whole chain, not just the eight main Windward islands) if superimposed on the US mainland would stretch approximately from Florida to California. They stretch 1,500 miles (2,400 kilometers). theguardian.com/news/2019…
Today I learned of Build the Enterprise, a plan to build a real-life functioning version of the USS Enterprise using today’s technology. It would get to the moon in 3 days or Mars in 3 months, be a kilometer long, fall somewhere between spaceship and space station, and cost $706 billion to build. wikipedia.org/wiki/Build_…
The Moon is farther away from Earth than most people realize. The Moon is an average of 238,855 miles (384,400 kilometers) away. That means 30 Earth-sized planets could fit in between Earth and the Moon. The Moon is slowly moving away from Earth, getting about an inch farther away each year. solarsystem.nasa.gov/moon…
The longest straight line you could sail is 32,000 kilometers. Sonmiani, Pakistan to Karaginsky District, Russia technologyreview.com/2018…
Milestii Mici is the biggest wine cellar in the world with a length of 200 kilometers. It is so big that to help visitors to not get lost, the tunnels have names like cities' names. en.wikipedia.org/wiki/Mil…
In 1956, the Soviet Union proposed to the US a joint bi-national project to warm the Arctic Ocean and melt some of the ice cap, by building a 90-kilometer-wide (56 mi) dam across the Bering Strait wikipedia.org/wiki/Bering…
Today I learned about Lunar lava tubes - Tunnels under the surface of the moon, kilometers long, hundreds of meters wide. Shelter from radiation and extreme temperatures. Can be used for habitation. en.wikipedia.org/wiki/Lun…
Huygens, an ESA spacecraft, was launched from Earth on October 15, 1997 to land successfully on Saturn's moon Titan on January 14, 2005. That's 1.2 billion kilometers. Its six instruments gathered atmospheric data and continued sending it 90min after touchdown. en.wikipedia.org/wiki/Huy…
The north pole of Mars is surrounded by a flat and featureless lowland, several kilometers lower the mean height of the planet, called Vastitas Borealis en.wikipedia.org/wiki/Vas…
In 2013, Russian explorers drove from Russia to Canada, using a bus to across the frozen Arctic Ocean, more than 4,000 kilometers (2,485 miles) in 70 days at a speed of 10 kph (6.2 miles/h) from the Russian archipelago Severnaya Zemlya to the pole and then to Resolute Bay in Canada's far north. phys.org/news/2013-05-rus…
A whale-sized asteroid, which could have easily destroyed an area the size of New York on collision, flew past Earth at nearly nine kilometers per sec. Surprisingly, the U.S. space agency, NASA, failed to detect the asteroid and spotted it only the day after it skimmed past the planet. techtimes.com/articles/21…
Statistically, due to it's size, Vatican City has 2.27 Popes per Square Kilometer youtu.be/C4whvUxeG88?t=26…
Today I learned about IceCube, a neutrino observatory made of a 1 cubic kilometer block of ice in Antartica. en.wikipedia.org/wiki/Ice…
The largest known landslide not in the ocean is Heart Mountain in Wyoming. A 1300 square kilometer, 4-5 kilometer thick sheet of rock traveled 40 kilometers in 30 minutes. en.wikipedia.org/wiki/Hea…
The longest successful glide by a passenger jet was Air Transat Flight 236 from Toronto to Lisbon in August, 2001. The aircraft glided 120 kilometers (75 miles) at 33,000 feet over the Atlantic Ocean after a fuel leak caused both engines to flame out. All passengers and crew survived. en.wikipedia.org/wiki/Air…
Russia's Kamchatka Peninsula has the highest concentration of active (29) volcanos on Earth. Separated by only 180 kilometers (110 miles), 4 of them, Shiveluch, Bezymianny, Tolbachik, and Kizimen were all erupting simultaneously on January 11, 2013. earthobservatory.nasa.gov…
Simon bolivar during his campaigns rode on horseback 123,000 kilometers, which is 10 times more than Hannibal, three times more than Napoleon, and twice as much as Alexander the Great. ruie.ucr.ac.cr/catalogo/A…
The left most pillar of the famous Pillars of Creation, is actually 4 Light Years tall. That is equal to roughly 37,844,000,000,000 Kilometers. en.wikipedia.org/wiki/Pil…
There is a graveyard orbit of satellites many kilometers above the usual geosynchronous orbit spacenews.com/venezuelas-…
A domino can knock over another domino that's a maximum of 1.5 times larger than itself. Based on that progression, if you started with a domino the size of a carbon atom, you could knock over the Burj Khalifa with a 1.22 kilometer tall domino in just 74 steps. businessinsider.com/how-o…
The unit parsec from Star Wars is in fact a real astronomical unit equal to a distance of 31 trillion kilometers or 3.26 lightyears en.wikipedia.org/wiki/Par…
Interstate 19 in Arizona is the only freeway in America that uses the metric system (kilometers and not miles). interstate-guide.com/i-01…
China achieved quantum entanglement -- when two particles in quantum superposition are linked so that if one is measured it instantly determines the state of the other object -- over a distance of 1200 kilometers, with one entangled proton on Earth and the other on a satellite. sciencemag.org/news/2017/…

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