2024-05-11 14:15
What is a megalopolis? There is no specific number of people, but it is an extremely large group of cities that are joined together by their transport, economy, resources, and other things… Read More
Blog Directory > Education Blogs > I Learned This Today education Blog >
I Learned This Today Blog
ilearnedthistoday.com
Tags:
oxygen
anniversary collection paramount
megalopolis
categories
cocoon
population
grasshoppers
carbon dioxide
kaiser wilhelm
grasshopper
I learn one thing every day. There is no reason why I can't find out the answers to the questions that I have, so I do. I write about them on my blog. From when was sliced bread invented to what is the Fermi Paradox? Come and learn with me. You won't regret it.
2024-05-10 06:17
How do vending machines check money? They check notes with cameras or photocells. They check coins with electromagnets and light sensors. They are much more able to spot fake notes and coins… Read More
2024-05-09 12:35
What is a rebreather? It is an underwater device that allows divers to reuse the air that they have breathed out, thereby being able to stay underwater much longer.
Most people, when at r… Read More
2024-05-08 13:12
Photo by amy chung: https://www.pexels.com/photo/silhouette-of-bird-flying-672802/How high can birds fly? A Ruppell’s vulture was hit by a plane at 11,300 meters. The bird was identifi… Read More
2024-05-07 13:17
Photo by MART PRODUCTION: https://www.pexels.com/photo/white-powder-on-knife-7230833/Is cocaine natural? The main ingredient in cocaine comes from a natural plant, but it needs to be p… Read More
2024-05-06 07:00
What happened to Kaiser Wilhelm? He was given asylum in the Netherlands, where he lived until he died in 1941.
Wilhelm became Emperor of Germany and King of Prussia in 1888. Germany was n… Read More
2024-05-05 14:20
Photo by maadhuri g: https://www.pexels.com/photo/printed-piece-of-fabric-2933636/How is silk made? It is made from the cocoon of the silkworm.
Silk is a natural material that has been ar… Read More
2024-05-04 11:57
Image By Trailer screenshot, from DVD The Ten Commandments, 50th Anniversary Collection Paramount, 2006 – The Ten Commandments trailer, Public Domain, https://commons.wikimedia.org/w/i… Read More
2024-05-03 02:05
Photo by Pixabay: https://www.pexels.com/photo/macro-photography-of-orange-grass-hopper-59981/Why can grasshoppers jump so high? They can store energy in their exoskeleton and release it lik… Read More
2024-05-02 03:14
Image Fair use, https://en.wikipedia.org/w/index.php?curid=8641079What is a failed state? It is a state that can no longer control its own security and does not have control over its territo… Read More
2024-05-01 05:27
By John Hayman – Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=2315683What is asbestos? Asbestos is a material made of lots of mineral fibers. It can be wove… Read More
2024-04-30 07:43
Photo by Andre Furtado: https://www.pexels.com/photo/selective-focus-photography-of-woman-holding-dslr-camera-1264210/How does autofocus work? Active autofocus works by calculating the dista… Read More
2024-04-29 09:16
Photo by Pixabay: https://www.pexels.com/photo/close-photography-of-white-polar-bear-53425/How do polar bears find enough food? By having an exceptional sense of smell, a lot of patience, an… Read More
2024-04-28 06:05
Photo by Greg Gulik: https://www.pexels.com/photo/green-grasses-on-sahara-desert-1001435/How deep is the desert? Depending on the desert, the sand is between 1 m and 43 m deep. Although, if… Read More
2024-04-27 10:23
Photo by Ethan Wilkinson: https://www.pexels.com/photo/crop-unrecognizable-person-demonstrating-british-passport-5428705/When did people start using passports? The idea for the modern passpo… Read More
2024-04-26 12:59
Image By Paolo Monti – Available in the BEIC digital library and uploaded in partnership with BEIC Foundation.The image comes from the Fondo Paolo Monti, owned by BEIC and located in t… Read More
2024-04-25 11:43
Was Robin Hood real? Probably not, but the legend could have been based on a real person.
Robin Hood has been made famous by the many movies that have been made about him. His story is le… Read More
2024-04-24 13:19
Image By Federal government of the United States – https://www.atomicheritage.org/history/hydrogen-bomb-1950, Public Domain, https://commons.wikimedia.org/w/index.php?curid=12656652How… Read More
2024-04-23 13:29
Photo by Davide Baraldi: https://www.pexels.com/photo/glass-bottles-on-shelf-1771809/How does anthrax kill? Anthrax is an infection caused by a bacterium called Bacillus anthracis. Because i… Read More
2024-04-22 13:05
Photo by Justine Lauzon: https://www.pexels.com/photo/fountain-of-the-four-rivers-and-sant-agnese-in-agone-church-in-piazza-navona-in-rome-17182356/Why is there an obelisk in Rome? The… Read More
2024-04-21 05:34
Image by Claude Monet – wartburg.edu, Public Domain, https://commons.wikimedia.org/w/index.php?curid=5504881What is impressionism? It was a style of art where the artist was trying to… Read More
2024-04-20 10:24
Photo by Jakub Zerdzicki: https://www.pexels.com/photo/smart-home-motion-sensor-17547230/How does a motion detector work? There are several different methods. They can use infrared light, mi… Read More
2024-04-19 14:05
Image By Emőke Dénes – kindly granted by the author, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=68007888Why are prunes a laxative? They contain a lot of… Read More
2024-04-18 08:18
Image By NASA / Voyager 2 / PDS / OPUS / Ardenau4 – Own workalso published on Flickr: https://www.flickr.com/photos/197038812@N04/53446862462/, CC0, https://commons.wikimedia.org/w/ind… Read More
2024-04-17 11:46
Image By Boris Radosavljevic – https://www.flickr.com/photos/139918543@N06/24532258070/, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=80427880What is a zombie virus? Zomb… Read More
2024-04-16 12:44
Image By NASA/Johns Hopkins University Applied Physics Laboratory/Arizona State University/Carnegie Institution of Washington – https://photojournal.jpl.nasa.gov/catalog/PIA11364, Publ… Read More
2024-04-15 14:06
Photo by Belle Co: https://www.pexels.com/photo/photo-of-high-rise-buildings-981150/Why did the Chinese government move to Taiwan? The Republic of China’s government lost a war with th… Read More
2024-04-14 05:21
Photo by Pixabay: https://www.pexels.com/photo/diamond-back-rattle-snake-36714/How does a rattlesnake rattle? They have loose hollow scales on the tips of their tails that strike each other… Read More
2024-04-13 08:59
Photo by Tom Fisk: https://www.pexels.com/photo/panoramic-view-of-oil-refinery-6767962/How much oil is left? About 1.5 trillion barrels, which is enough oil for roughly 47 years.
There ar… Read More
2024-04-12 13:05
Photo by Genaro Servín: https://www.pexels.com/photo/person-riding-a-bicycle-during-rainy-day-763398/What are El Nino and La Nina? They are climate patterns that happen in the Pacific… Read More
2024-04-11 13:14
Photo by Sachin Nihcas: https://www.pexels.com/photo/timelapse-of-a-bird-landing-on-a-branch-5814467/How do birds land? It depends on the size of the bird and whether it is a landing on land… Read More
2024-04-10 13:26
Photo by orlando s.: https://www.pexels.com/photo/rusty-metal-pipes-with-railings-on-grass-11531870/How does an oil pipeline pump oil so far? They use centrifugal pumps to convert rotational… Read More
2024-04-09 12:52
Pointe de flècheWhen does history start? This is a difficult question, but we have prehistory, protohistory, and then history. Protohistory is the point where prehistory becomes histo… Read More
2024-04-08 13:13
Photo by Andrea Piacquadio: https://www.pexels.com/photo/man-in-black-suit-riding-bicycle-down-the-street-1843752/How does a bicycle stay upright? It is a combination of things, but nobody s… Read More
2024-04-07 07:26
Image By Unknown author – http://www.courses.fas.harvard.edu/~chaucer/canttales/sirthop/hoccport.htm, Public Domain, https://commons.wikimedia.org/w/index.php?curid=47359536Geoffrey Ch… Read More
2024-04-06 10:20
Photo by Thierry Fillieul: https://www.pexels.com/photo/gray-airplane-638698/Why is a plane’s propeller at the front but a boat’s at the back? Because of how they move through th… Read More
2024-04-06 10:20
Photo by Thierry Fillieul: https://www.pexels.com/photo/gray-airplane-638698/Why is a plane’s propeller at the front but a boat’s propeller at the back? Because of how they move… Read More
2024-04-05 12:54
Photo by cottonbro studio: https://www.pexels.com/photo/man-smoking-cigarettes-5920578/What is racketeering? It is a criminal act that usually involves extortion or a scheme to extract illeg… Read More
2024-04-04 13:14
Image By Phil Kates – https://www.flickr.com/photos/hawk684/108139247/, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=51031248Why does sunburned skin peel? It peels bec… Read More
2024-04-03 05:48
Photo by MART PRODUCTION: https://www.pexels.com/photo/technology-computer-head-health-7089020/What causes an epileptic seizure? It is caused by abnormal electrical activity in the bra… Read More
2024-04-02 06:22
Photo by Pixabay: https://www.pexels.com/photo/black-and-gold-machine-60064/What is a metal? A metal is any material that readily loses its outer shell electrons, can be polished to be highl… Read More
2024-04-01 08:45
Photo by Expect Best: https://www.pexels.com/photo/buildings-with-glass-windows-351264/What is a limited company and a shell company? A limited company is one where the risk is limited to th… Read More
2024-03-31 01:15
Image By Daniel Nikolaus Chodowiecki – DANIEL CHODOWIECKI 62 bisher unveröffentlichte Handzeichnungen zu dem Elementarwerk von Johann Bernhard Basedow. Mit einem Vorworte von Max… Read More
2024-03-30 07:35
Image By Don Davis – Donald Davis' official site, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1684410What will happen to the Voyager spacecraft? Unless they collide… Read More
2024-03-29 06:34
Photo by Daniel B: https://www.pexels.com/photo/photo-of-trees-covered-in-moss-141233/Is moss one plant or many plants? A patch of moss is made up of many moss plants.
There are many type… Read More
2024-03-28 13:44
Image By anonymous (Queen Mary Master) – this file: scan dated 2009, uploaded (without identification of the source) 12 May 2010 by Ann Scott (medievalminds.comReeve-and-Serfs.original… Read More
2024-03-27 13:18
Image By In source box put https://www.scientificanimations.com – In source box put https://www.scientificanimations.com/wiki-images, CC BY-SA 4.0, https://commons.wikimedia.org/w/inde… Read More
2024-03-26 13:38
Photo by cottonbro studio: https://www.pexels.com/photo/elderly-couple-smiling-together-7236499/Why does hair turn white? The pigment cells in the hair follicles die.
Our hair is colored… Read More
2024-03-25 13:29
Photo by Antonio Batinić: https://www.pexels.com/photo/ambulances-on-a-parking-lot-5364345/Why does the medical symbol have a snake and a staff on it? It is the Rod of Asclepius, an anc… Read More
2024-03-24 05:29
Image By Alexander Cumming – http://www.theplumber.com/closet.html, Public Domain, https://commons.wikimedia.org/w/index.php?curid=76102354Alexander Cumming invented the S-bend in 1775… Read More
2024-03-23 02:02
Photo by Jessica Lewis thepaintedsquare: https://www.pexels.com/photo/selective-focus-photography-of-bunch-of-blueberries-583837/Why are blueberries blue and strawberries red? Because of th… Read More
2024-03-22 13:26
Photo by Haley Black: https://www.pexels.com/photo/white-concrete-building-2087387/What is a crusade? It is a Catholic expedition called forth by the pope for various religious purposes. If… Read More
2024-03-21 13:14
Image By Romain – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=114415511What is the golden ratio? It is 1.618.
The golden ratio appears in nature, in art… Read More
2024-03-20 05:01
Photo by Elina Sazonova: https://www.pexels.com/photo/red-poppy-flower-field-1876620/Why are poppies a symbol of remembrance? Because of a poem by a Canadian doctor called John McCrae. The p… Read More
2024-03-19 14:00
Image By Sergiodlarosa – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=71545069How big was a Megalodon? The largest ones could have been 20 meters long.
Me… Read More
2024-03-18 13:32
Image Public Domain, https://commons.wikimedia.org/w/index.php?curid=425064When did people start writing music down? Music was first written down in the 6th century BC, but the current… Read More
2024-03-17 13:11
Image By Ladislav Markuš – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=40159287Shuji Nakamura invented the blue LED, without which we wouldn’t… Read More
2024-03-16 04:24
Image By Project Liberty Ship, Attribution, https://commons.wikimedia.org/w/index.php?curid=3264194How did America build so many Liberty ships in World War 2? They could build so many becaus… Read More
2024-03-15 13:43
Photo by panumas nikhomkhai: https://www.pexels.com/photo/close-up-photo-of-mining-rig-1148820/How many servers are in a data center? It depends on the company and the type of server… Read More
2024-03-14 13:21
Image By Unknown author – Musei Vaticani (Stato Città del Vaticano), Public Domain, https://commons.wikimedia.org/w/index.php?curid=49885704What is the Ides of March? It is the… Read More
2024-03-13 13:17
Image By moi-même – Self-photographed, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1475134Why are truffles so expensive? They are very rare and very difficult… Read More
2024-03-12 13:17
Photo by Karolina Grabowska: https://www.pexels.com/photo/selective-focus-of-a-bitcoin-on-laptop-computer-5980743/What is Bitcoin? It is the original, and the most famous, digital currency… Read More
2024-03-11 13:23
Image By Lt. Col. Leslie Pratt – MQ-9 Reaper UAV.jpg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=68095681When was the first drone? The first real drone was built in… Read More
2024-03-10 06:06
Image By Ronald L. Rivest – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=44374880Ron Rivest, Adi Shamir, and Leonard Adleman were the creators of the RSA enc… Read More
2024-03-09 08:14
Image By Jeffrey W. Lotz – http://www.forestryimages.org/browse/detail.cfm?imgnum=5385241, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=18477126How does the female lac bu… Read More
2024-03-08 08:22
Photo by Leon Natan: https://www.pexels.com/photo/photo-of-the-national-flag-of-israel-6851497/How did Israel end up where it is? The British government had the idea to create a Jewish homel… Read More
2024-03-07 13:12
Photo by Sides Imagery: https://www.pexels.com/photo/boxers-inside-a-ring-3531081/What are the Queensberry rules? They are the rules for boxing published in 1867 and endorsed by the 9th Marq… Read More
2024-03-06 07:34
Photo by icon0 com: https://www.pexels.com/photo/dinosaur-statue-730433/Why did Tyrannosaurus rex have short arms? No one really knows. They could have no reason and be left over from longer… Read More
2024-03-05 13:03
Image By National Archives Photo – Social Security History Site, Public Domain, https://commons.wikimedia.org/w/index.php?curid=374093What caused the Great Depression? There are many c… Read More
2024-03-04 12:31
Image By Attributed to Leonardo da Vinci – http://www.originaldo.com/monacomp2.jpeg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=9423997Who painted the Isleworth Mon… Read More
2024-03-03 05:11
Image By Ben Zinner, USAID – http://www.usaid.gov/; source; exact image URL, Public Domain, https://commons.wikimedia.org/w/index.php?curid=75331192Norman Ernest Borlaug was known as t… Read More
2024-03-02 13:47
Image By User:Staecker – Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=658367What happened to the Aral Sea? The Soviet Union diverted the rivers that fed it… Read More
2024-03-01 06:30
Photo by Pixabay: https://www.pexels.com/photo/person-holding-paintbrush-221027/What does paint primer do? It helps paint stick to the surface, it helps the paint last longer, and it protect… Read More
2024-02-29 13:08
https://www.timeanddate.com/calendar/monthly.html?year=2024&month=2&country=26Why do we have a leap year? We have a leap year because the calendar year doesn’t exactly match th… Read More
2024-02-28 13:00
Photo by tyler hendy: https://www.pexels.com/photo/titrist-golf-ball-near-golf-hole-54123/Why does a golf ball have dimples? They make the ball go further.
Golf balls didn’t always… Read More
2024-02-27 13:44
Photo by Bl∡ke : https://www.pexels.com/photo/drone-shot-of-fisher-body-plant-21-in-detroit-michigan-9599945/What happened to Detroit? The city declared bankruptcy in 2013, with… Read More
2024-02-26 13:03
Photo by Pixabay: https://www.pexels.com/photo/brown-corks-on-clear-wine-glass-36741/Where does cork come from? Cork comes from the bark of the cork oak tree.
The primary use of cork is t… Read More
2024-02-25 05:16
Image By (archived link), Fair use, https://en.wikipedia.org/w/index.php?curid=1376912Henrietta Lacks developed cervical cancer and the cells taken from a tumor biopsy have formed the HeLa c… Read More
2024-02-24 07:50
Photo by cottonbro studio: https://www.pexels.com/photo/smoke-coming-out-of-glass-5546964/Why does dry ice fog sink? The gas from dry ice is more dense than air and therefore it sinks.
Dr… Read More
2024-02-23 01:34
Photo by Manuela Adler: https://www.pexels.com/photo/body-of-water-across-forest-949194/How do animals find water? They have many methods. Some animals can smell or sense water. Some animals… Read More
2024-02-22 11:49
Photo by Skitterphoto: https://www.pexels.com/photo/brown-rope-on-a-pulley-69756/Why does a pulley make weights easier to lift? They increase mechanical advantage.
The pulley is an invalu… Read More
2024-02-21 13:06
Image By https://www.scientificanimations.com – https://www.scientificanimations.com/wiki-images, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=91085787Can you live wit… Read More
2024-02-20 01:53
Photo by Hilmi Işılak: https://www.pexels.com/photo/gray-fighter-plane-on-airport-4311318/How does an ejection seat work? In the simplest sense, they remove the canopy to the plane… Read More
2024-02-19 05:17
Photo by Anthony : https://www.pexels.com/photo/closed-up-photography-of-brown-wooden-framed-sony-speaker-157534/What is the upper limit of a speaker? The loudest speaker ever made produced… Read More
2024-02-18 04:58
https://www.media.volvocars.com/global/en-gb/media/photos/6486Nils Bohlin invented the three-point seat belt in 1959. There is no way of working out how many people his invention has saved… Read More
2024-02-17 09:12
Photo by Rajukhan Pathan: https://www.pexels.com/photo/colorful-bird-with-green-shiny-plumage-6543040/Why do some birds have red eyes? Birds with red eyes have a lot of tiny blood vessels in… Read More
2024-02-16 13:40
Photo by Pixabay: https://www.pexels.com/photo/human-in-black-orange-swimming-suit-in-blue-body-of-water-37530/What causes the bends? It is caused by the rapid release of nitrogen gas from t… Read More
2024-02-15 13:04
Photo by Vidal Balielo Jr.: https://www.pexels.com/photo/man-operating-a-surgery-3376790/How does chilling a patient after cardiac arrest work? If the body temperature of a person whose hear… Read More
2024-02-14 13:00
Photo by Pixabay: https://www.pexels.com/photo/gold-bar-lot-47047/What is a karat? It is a way to measure the purity of gold. (In the UK, karat is spelled as carat – more on that later… Read More
2024-02-13 13:04
Image By Angr – This file has been extracted from another file, Public Domain, https://commons.wikimedia.org/w/index.php?curid=832356What was the Great Stink? It happened in Central Lo… Read More
2024-02-12 04:54
Photo by Raveender Nagaraju: https://www.pexels.com/photo/monorail-in-kuala-lumpur-13459238/How does a monorail balance? The single rail of a monorail train is much wider than a rail on a re… Read More
2024-02-11 13:18
Image By Walter Reed Army Medical Center – The photo is a cropped version of the original, which is Order Number B014616 in the National Library of Medicine. The date and author (below… Read More
2024-02-10 03:58
Image By Bongoman – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3799202Is palm oil bad? It depends. It is bad in terms of health and environmental costs, bu… Read More
2024-02-09 13:10
Photo by urtimud.89: https://www.pexels.com/photo/wreck-of-airplane-10032959/What is survivorship bias? It is when researchers focus on the individuals that have passed a selection process… Read More
2024-02-08 13:11
Image By NOAA/MBARI – http://www.mbnms-simon.org/other/photos/photo_info.php?photoID=417, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1935687How do deep sea creature… Read More
2024-02-07 13:09
Photo by Luci: https://www.pexels.com/photo/a-hand-wearing-white-gloves-holding-an-inhaler-6816451/What is asthma? It is a lung disease where the airflow through the throat becomes restricte… Read More
2024-02-06 12:09
Photo by Leandro Boogalu: https://www.pexels.com/photo/man-wearing-black-tank-top-and-running-on-seashore-1390403/What is VO2 max? The V stands for volume, the O2 for oxygen, and the max for… Read More
2024-02-05 08:59
Photo by Skitterphoto: https://www.pexels.com/photo/sport-alley-ball-game-4192/Why are there ten pins in bowling? Because nine pin bowling was outlawed.
Bowling is a very old game because… Read More
2024-02-04 07:21
Image By Unknown author – Internet download, Public Domain, https://commons.wikimedia.org/w/index.php?curid=154887Henry Dunant was born in Geneva on 8 May 1828. Have you heard of the R… Read More
2024-02-03 01:18
Image By Senior Airman Brian KellyVIRIN: 170322-F-ZZ999-002E.JPG – https://www.defense.gov/observe/photo-gallery/igphoto/2001813286/, Public Domain, https://commons.wikimedia.org/w/ind… Read More
Subscribe to I Learned This Today
Get updates delivered right to your inbox!