A "cobble" is an actual size of rock, defined on the Udden–Wentworth scale as between 64–256 millimeters (2.5–10.1 in), larger than a pebble and smaller than a boulder. en.wikipedia.org/wiki/Cob…
Some bacteria can be visible to the naked eye! Thiomargarita namibiensis can grow up to 3/4 of a millimeter (750 ΞΌm) due to a cavity that is used to store, and later convert, nitrate. en.wikipedia.org/wiki/Thi…
Learned that things emit radio waves (also known as millimeter wave) above certain temperature. youtube.com/watch?v=JBvHq…
In 1975, the Soviets fired the first and only "space cannon" from the Salyut-3 space station as a part of a project to test space defence against potential attacks. The gun is a modified version of the R-23 23-millimeter aircraft cannon that was designed for the TU-22 supersonic bomber. popularmechanics.com/mili…
After almost 20 years of battling for a Hubble budget and creating the telescope, and after finally putting it into orbit, the first images NASA received were blurry because the mirror curvature was off by 2.2 thousandth of a millimeter. en.wikipedia.org/wiki/Hub…
Human eyeballs only grow about 8 millimeters from birth to adolescence, making them the only body part that stays relatively the same size throughout your life. huffpost.com/entry/eye-fa…
Electronics sniffing dogs are a real thing. They can even sniff out tiny microSD cards that are less than a millimeter thick. techrepublic.com/article/…
A metric foot and a metric inch are each a real unit of measurement. A metric foot is 300 millimeters (11.811 in), and a metric inch is 25 millimeters (0.984 in). en.wikipedia.org/wiki/ISO…
Some of the first US spy satellites took imagery on 70 millimeter film, which was recovered by dropping huge film canisters from space and catching them mid-air by a passing US Air Force plane en.wikipedia.org/wiki/Cor…
The iPhone 3G safety manual warns that radiation exposure may exceed government standards during β€œbody-worn operation” if the phone is β€œpositioned less than 15 millimeters (5/8 inch) from the body” The iPhone, Apple says, should always be worn in a belt clip or holster. newsweek.com/iphone-6-ben…
The average size of a raindrop is 6 millimeters in diameter, about the size of a housefly. hypertextbook.com/facts/2…
Your fingernails grow 0.000001157 millimeters a second, 0,0041652mm/hour and 0.1mm/day. health.howstuffworks.com/…
Today I learned of the Visible Human Project, where in 1993, a murderer was frozen, sliced and imaged, millimeter by millimeter, from the top of his head to the bottom of his feet, for science. youtube.com/watch?v=7GPB1…
Once light is generated deep inside the sun, it travels to the surface of the sun at only a quarter of a millimeter each second abc.net.au/science/articl…
Scientists from South Africa discovered a formula that calculates how likely a frog is to eat another frog. "For every one millimeter increase in body size, a frog is 2.8 percent more likely to eat other frogs." audioburst.com/burst/5dfc…
Beavers wear their teeth down as much as a millimeter per day, but grow continuously at a rate 10x faster than human fingernails. en.wikipedia.org/wiki/Bea…
The Curiosity Rover has a laser dubbed the ChemCam. The ChemCam fires a laser and analyzes the elemental composition of vaporized materials from areas smaller than 0.04 inch (1 millimeter). It has a range of 23 feet or 7 meters. mars.nasa.gov/msl/mission…
In 1959 the "inch" was adjusted by 2 millionths of an inch, to make it equal exactly 25.4 millimeters. npl.co.uk/reference/faqs/…
The 2004 Indian Ocean Earthquake "significantly reduced the capacity of the Indian Ocean, producing a permanent rise in the global sea level by an estimated 0.1 millimeters (0.004 in)." en.wikipedia.org/wiki/200…
As a boy, Michael Bay attached some firecrackers to a toy train and filmed the ensuing fiery disaster with his mother's 8 millimeter camera. The fire department was called and he was grounded en.wikipedia.org/wiki/Mic…
'Cheez-Its' are actually not squares, they are considered rectangles. Two of the four sides are 2 millimeters longer than the others. en.wikipedia.org/wiki/Che…
A fruit fly only a few millimeters in size produces sperm cells that are almost six centimeters long media.uzh.ch/en/Press-Rel…
With a special method of receiving GPS signals, the accuracy can be increased to 2 millimeters. This is accurate enough to track the movement of tectonic plates. en.wikipedia.org/wiki/Glo…
The CN Tower, standing at 553.3 meters/1815.3 feet tall, deviates from perfect vertical accuracy by only 29 millimeters/1.1 inches. ieee.ca/millennium/cntowe…
Playing tetris can increase the thickness of the cortex by up to half a millimeter news.bbc.co.uk/2/hi/uk_ne…
In the metric system, prefixes that indicate multipliers are typically Greek in origin, such as kilogram, while those that indicate divisors are Latin, as in millimeter. en.wikipedia.org/wiki/Cla…
George Church, an American geneticist, molecular engineer and chemist, wrote 5.5 petabits (687.5 terabytes) on a cubit millimeter of DNA. Showing that DNA can also be another type of storage medium such as hard drives and magnetic tapes. wyss.harvard.edu/viewpres…
The deepest picture of space ever taken is the Hubble Ultra Deep Field and contains over 10,000 galaxies in an area about a millimeter square -- Mind = Blown en.wikipedia.org/wiki/Hub…
The Atacama Desert gets an average rainfall of 1 millimeter (.04 inches) per year and had not had any significant rainfall in over 400 years... until July 2011, when it received a whopping 80 centimeters (31.5 inches). en.wikipedia.org/wiki/Ata…
Sea sapphires are millimeter-long crustaceans that live in fresh or salt water. They can turn iridescent shades of blue, purple or green, and even become invisible. fromthegrapevine.com/inno…
The Nanodragster is a nanocar which is 50,000 times thinner than a human hair and has a top speed of 0.014 millimeters per hour. en.wikipedia.org/wiki/Nan…
Today I learned what a millimeter wave scan actually looks like.
While electric signals move at close to the speed of light, the actual speed of the electrons in the current is "on the order of millimeters per hour". en.wikipedia.org/wiki/Spe…
The female cat will utter a loud yowl as the male pulls out of her after sex. This is because a male cat's penis has a band of about 120–150 backwards-pointing penile spines, which are about one millimeter long. en.wikipedia.org/wiki/Cat
Circumcised men are on average 8 millimeters shorter in terms of erect length compared to their intact counterparts en.wikipedia.org/wiki/Hum…
China created over 1 million pieces of space debris larger than one millimeter when it launched a missile at a satellite in 2007. This remains the single largest creation of space debris ever recorded. en.wikipedia.org/wiki/Spa…
It takes about 6 months for a fingernail to replace itself (grow out) from the root at a rate of about 3 millimeters per month; toenails grow back in 12-18 months at a rate of about 1 millimeter every month www-scf.usc.edu/~uscience…
People allergic to dust are in fact allergic to the feces of dust mites smaller than a millimeter in size en.m.wikipedia.org/wiki/H…
Five thousandths of a millimeter is the tolerance of accuracy at the LEGO mold factories. [and other random facts] dumpaday.com/index.php/20…
If the mass of the Earth was compressed to 8.7 millimeters in radius, it would become a black hole. astronomy.swin.edu.au/cos…
In traditional Swedish textile painting a "frost" is a small misalignment, a millimeter or so, that shows when all the colours in a pattern are printed story.visitsweden.com/mee…
NASA has data showing from 1870 to present, an average rise in sea levels of over 3 millimeters per year. climate.nasa.gov/vital-si…
Moon is spiralling away from earth at 38 millimeters per year. news.discovery.com/space/…
That, while electrical current in a wire moves at near-light speed, electrons inside the wire actually flow with speeds in the order of the millimeters/second. en.wikipedia.org/wiki/Dri…
As a boy, Michael Bay attached some firecrackers to a toy train and filmed the ensuing fiery disaster with his mother's 8 millimeter camera. The fire department was called and he was grounded michaelbay.com/project/ar…
Mount Everest grows approximately 0.1576 inches (about four millimeters) each year, meaning each new climber actually goes just a little bit higher nationalgeographic.com/fe…
A typical semi trailer oil tanker is only 5 millimeters (0.195 inches) thick. ehow.com/facts_8052576_ty…
Michael Bay, as a boy, attached some firecrackers to a toy train and filmed the ensuing fiery disaster with his mother's 8 millimeter camera. The fire department was called and he was grounded. usatoday30.usatoday.com/l…
Pycnogonids, aka "sea spiders", are marine arthropods. There are over 1300 known species and they range in size from 1 to 10 millimeters to over 90 cm. ucmp.berkeley.edu/arthrop…

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