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Top 5 Interesting Math Facts You Never Knew
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1) Roman Numeral IVAlthough the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better. 2) Base 60The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero." 3) Fraction BarThe Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole. It wasn't until later in h ...
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1233 |
bio_man |
5 years ago |
A mummy in Italy that blinks
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In the catacombs of Sicily, there's a creepy child mummy named Rosalia Lombardo who appears to open and close her eyes on a regular basis. Here's how a scientist solved the mystery of this little "sleeping beauty". (Hint: she's not actually undead.)
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1276 |
duddy |
9 years ago |
High school is done… now what?
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Millions of new high school graduates will soon be heading to college. Here are five tips for the summer ahead. Cue the Pomp and Circumstance.For most high school seniors, it's that time of year – the time when funny hats are thrown into the air to signal the end of sheltered bubbles and parental control, and the beginning of the path to expanded horizons. But if you were like me, the standard graduation song that everyone hears takes a back seat to your soon-to-be fight song that makes you distinct. Before you can step foot onto the college campus of your choice, however, you must spend three months in educational limbo. Sure, you'll be working, possibly taking a summer class or two and enjoying your weekends (be careful, kids), but through ...
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1480 |
bio_man |
6 years ago |
The reason behind your emotions, according to Hippocrates
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Hippocrates (460–377 BC) postulated that the imbalance or excess of four fluids (called humors) within the body play a role in ones emotional and physical state. The chart below shows the four humors (row 1), the condition created by too much of each (row 2), and their respective emotions (row 3): The Hippocratic theory of personality popularized the practice of bloodletting — opening a vein or applying leeches to "drain off" excessive amounts of the troublesome humor. In medieval Europe, it was common for barber-surgeons (whose professional practice relied on sharp instruments like knives and razors) to advertise their bloodletting services by posting a sign depicting a pale human arm traced with a crimson spiral of blood. (Remember that a ...
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1724 |
bio_man |
A year ago |
One of the oldest living organisms in the world
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This is one of the oldest living organisms in the world. This very dense, flowering shrub is related to parsley and lives in the extremely high elevations of the Atacama Desert in Chile. It is at least 2,000 years old.
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2201 |
duddy |
10 years ago |
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2554 |
duddy |
9 years ago |
What did King Tut look like?
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King Tut was riddled with physical impairments because his parents were probably brother and sister, a new genetic analysis and thousands of CT scans of his mummified body have suggested.
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2822 |
duddy |
9 years ago |
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3071 |
duddy |
9 years ago |
Did humans really step-foot on the moon?
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This is not an illusion or some kind of sci-fi illustration. It's an actual laser beam, being shot at the eclipsed Moon on the 15 April 2014. The laser's target is the Apollo 15 retroreflector, which was left on the Moon by astronauts in 1971.
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3168 |
duddy |
10 years ago |
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3972 |
duddy |
9 years ago |
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4574 |
duddy |
8 years ago |
Mesolithic man
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The genome of the 7,000-year-old hunter-gatherer has given scientists unprecedented insight into modern humans before the rise of farming, and overturns the popular image of light-skinned European hunter-gatherers. The DNA was taken from the wisdom tooth of the Mesolithic man and revealed he was probably lactose intolerant, had more difficulty digesting starchy foods than today's humans, and carried mutations that boost the immune system against nasty illnesses previously thought to only be introduced to humans by farm animals. ...
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4852 |
duddy |
10 years ago |
All corn today, as we know corn, is GMO corn
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Here's how 9,000 years of selective breeding has changed corn from a wild grass - that required a hammer to peel - to the juicy yellow ears of deliciousness we know today.
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5122 |
duddy |
9 years ago |
How did your language evolve?
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This family tree illustrates the lineages of Indo-European and Uralic languages though-out human history, and how some of the world's most-used languages came to be. And it's pretty enough to put on your wall.
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5134 |
duddy |
9 years ago |
Four color theorem
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The Four Color Theorem is a famous mathematical theorem that states that no more than four colors are required to color the regions of any map so that no two adjacent regions have the same color. Adjacent means that two regions share a common boundary curve segment, not merely a corner where three or more regions meet. Unlike other proofs before its discovery, computers were used to resolve this long-standing mathematical conjecture that was first proposed in 1850 by Francis Guthrie. After more than a century later, mathematicians, Kenneth Appel and Wolfgang Haken, finally derived its proof in 1976, and determined that it is practicality impossible for humans to verify it without the use of a computer. According to the four color theorem, a ...
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5300 |
bio_man |
2 years ago |