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
Blog Directory > Education Blogs > I Learned This Today education Blog >
I Learned This Today Blog
ilearnedthistoday.com
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.
2024-04-26 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
2024-02-01 13:16
Image By Stefan Zachow for the International Mathematical Union; retouched by King of Hearts – File [1], Public Domain, https://commons.wikimedia.org/w/index.php?curid=2277414What is t… Read More
2024-01-31 13:12
Photo by Jeffry Surianto: https://www.pexels.com/photo/japan-airlines-aircraft-taking-off-19655194/What are V1 and V2 on a plane? V1 is the point where a plane must take off and V2 is the sp… Read More
2024-01-30 13:09
Photo by RDNE Stock project: https://www.pexels.com/photo/confused-man-looking-at-the-laptop-screen-6517090/What is the sunk cost fallacy? It is where people are reluctant to abandon a cours… Read More
2024-01-29 13:28
Image By Arpad Horvath – Own work, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=637353What is a gluon? It is a massless subatomic particle that carries the force that… Read More
2024-01-28 05:31
Image By Caspar Netscher – http://ressources2.techno.free.fr/informatique/sites/inventions/inventions.html, Public Domain, https://commons.wikimedia.org/w/index.php?curid=44047Christia… Read More
2024-01-27 09:11
Photo by KATRIN BOLOVTSOVA: https://www.pexels.com/photo/brown-wooden-gavel-on-brown-wooden-table-6077326/Why do we say, “pass the bar”? The bar was a physical bar that sep… Read More
2024-01-26 13:39
Photo by Ben Phillips: https://www.pexels.com/photo/grey-shark-swimming-in-blue-waters-4781932/How do sharks sense electricity? With a special organ called the ampullae of Lorenzini. They ar… Read More
2024-01-25 13:09
Photo by Kellie Churchman: https://www.pexels.com/photo/landscape-photograph-of-body-of-water-1001682/What color is the sea? It is technically blue, but that depends on the depth and what pa… Read More
2024-01-24 13:37
By Robert Pittman – NOAA (http://www.afsc.noaa.gov/Quarterly/amj2005/divrptsNMML3.htm]), Public Domain, https://commons.wikimedia.org/w/index.php?curid=1433661Is a killer whale a whale… Read More
2024-01-23 10:50
Image By https://web.archive.org/web/20080518004931/http://www.atomicforum.org/russia/tsarbomba.html (photograph belongs to Russian department of Atomic Energy Minatom), Fair use, https://en… Read More
2024-01-22 13:04
Image By Thibault, (1830-1927) – L’Histoire par l’image, Public Domain, https://commons.wikimedia.org/w/index.php?curid=19160084When were photographs first used in newspape… Read More
2024-01-21 07:16
Image By Unknown author – Weltrundschau zu Reclams Universum 1902, Public Domain, https://commons.wikimedia.org/w/index.php?curid=9647607Joseph Lister was born in Britian in 1827. He b… Read More
2024-01-20 05:09
Photo by Kelly : https://www.pexels.com/photo/aerial-photography-of-assorted-color-buildings-2898214/Why is there such a difference between Haiti and the Dominican Republic… Read More
2024-01-19 10:40
Photo by Aaron Houston: https://www.pexels.com/photo/view-of-the-ferry-building-san-francisco-6441569/When did daylight savings time start? It started in Canada in 1908.
Daylight savings… Read More
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