{"id":38883,"date":"2015-01-31T00:00:28","date_gmt":"2015-01-31T08:00:28","guid":{"rendered":"http:\/\/www.todayifoundout.com\/?p=38883"},"modified":"2015-01-30T15:35:46","modified_gmt":"2015-01-30T23:35:46","slug":"weekly-wrap-volume-73","status":"publish","type":"post","link":"http:\/\/www.todayifoundout.com\/index.php\/2015\/01\/weekly-wrap-volume-73\/","title":{"rendered":"Weekly Wrap Volume 73"},"content":{"rendered":"
This is a weekly wrap of our popular Daily Knowledge Newsletter. You can get that newsletter for free here<\/a>.<\/div>\n

\"piano\"<\/a>The Invention of the Piano<\/a><\/p>\n

The names that come to mind at the mention of the Italian Renaissance are the likes of Medici, Da Vinci, and Galileo. Few, however, know the name Bartolomeo Cristofori, an accomplished craftsman who lived and worked during that era. You may not know his name, but you do know his greatest invention- the \u201charpsichord with loud and soft,\u201d better known today as the piano. Little is known of Cristofori\u2019s family or childhood, other than that he was born in 1655 and grew up in the town of Padua, located in the Republic of Venice. As an adult, besides working on a… (more<\/a>)<\/p>\n

\"Ionosphere_Layers\"<\/a>Why Do Radio Signals Travel Farther at Night than in the Day?<\/a><\/p>\n

Not all radio waves travel farther at night than during the day, but some, short and medium wave, which AM radio signals fall under, definitely can given the right conditions. The main reason this is the case has to do with the signal interacting with a particular layer of the atmosphere known as the ionosphere, and how this interaction changes from the nighttime to the daytime.The ionosphere is a layer of the upper atmosphere about 50 to 600 miles above sea level. It gets its name because it is ionized consistently by solar and cosmic… (more<\/a>)<\/p>\n

\"pencil-lead\"<\/a>Why Pencil \u201cLead\u201d is Called \u201cLead\u201d<\/a><\/p>\n

In the 16th century, a large deposit of pure, solid graphite was discovered in Borrowdale, England. This was the first time in recorded history that high quality, solid graphite had been found. When metallurgists first encountered this substance, they thought it was some sort of black lead, rather than a form of carbon. Thus, they called it \u201cplumbago\u201d, which is derived from \u201cplumbum\u201d, which is Latin for \u201clead\u201d. It didn\u2019t take people long to realize that solid sticks of high quality graphite were good for marking things. At… (more<\/a>)<\/p>\n

\"rooster-crow\"<\/a>Why Do Roosters Crow?<\/a><\/p>\n

Next to the bark of a dog or the gentle meowing of a cat, the crow of a rooster is one of the most recognisable animal noises on Earth; but why exactly do roosters feel the need to crow and is there any truth to the idea that they crow more (or only) in the morning? Surprisingly, although chickens are one of the most ubiquitous (and delicious) animals on the planet, it wasn\u2019t until 2013 that scientists definitively answered these questions. First and foremost, it\u2019s important for us to point out that roosters will crow at all times and in response… (more<\/a>)<\/p>\n

\"Albert_Einstein\"<\/a>The Theft and Half Century Journey of Einstein\u2019s Brain<\/a><\/p>\n

On April 17, 1955, the greatest scientist of his generation checked himself into Princeton Hospital due to chest pains. By early the next morning, Albert Einstein had died from an abdominal aortic aneurysm \u2013 the rupture of the aorta, the heart vessel that\u2019s the body\u2019s main supplier of blood. While word was still getting out that the great Dr. Einstein had passed away at the age of 76, something rather disturbing was happening at the hospital, if not downright nefarious. Einstein\u2019s brain, the keeper of one of the world\u2019s greatest intellects, had been stolen. And that is just the beginning of the story. Dr. Thomas Stolz Harvey was the pathologist on call during the early morning hours of the 18th and was the doctor assigned to attend to Dr. Einstein. Seven hours… (more<\/a>)<\/p>\n

Bonus<\/span> Quick Facts:<\/strong><\/p>\n