Learn One Thing A Day

Some useful resources: It hosts the Open Textbook Library,  https://open.umn.edu/opentextbooks , which currently offers more than 1200 open textbooks. The multi-institutional LibreTexts project produces open textbooks, including in physics,  https://phys.libretexts.org . MIT offers lectures and course materials for thousands of its undergraduate and graduate classes at OpenCourseWare,  https://ocw.mit.edu . Found on  https://pubs.aip.org/physicstoday/article/76/7/18/2899794/Free-textbooks-and-other-open-educational 

Hello Internet, today I read something definitely worth sharing. What does make a Civilization a Civilization ? From Quora   "Years ago, anthropologist Margaret Mead was asked by a student what she considered to be the first sign of civilization in a culture. The student expected Mead to talk about fishhooks or clay pots or grinding stones. But no. Mead said that the first sign of civilization in an ancient culture was a femur (thighbone) that had been broken and then healed. Mead explained that in the animal kingdom, if you break your leg, you die. You cannot run from danger, get to the river for a drink or hunt for food. You are meat for prowling beasts. No animal survives a broken leg long enough for the bone to heal. A broken femur that has healed is evidence that someone has taken time to stay with the one who fell, has bound up the wound, has carried the person to safety and has tended the person through recovery. Helping someone else through difficulty is where civilization...

Meet the Libray of Babel  , where every possible combinations of letters and words you can invent is already there.  Try it! https://libraryofbabel.info/search.html More info here:

The Monty Hall Problem is nice brain teaser, based on the American television game show Let's Make a Deal and named after its original host, Monty Hall. It became famous as a question from a reader's letter quoted in Marilyn vos Savant's "Ask Marilyn" column in Parade magazine in 1990 (Internet Archive  [1] ) Suppose you're on a game show, and you're given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 3,  which has a goat. He then says to you, "Do you want to pick door No. 2?" Is it to your advantage to switch your choice?  The answer is YOU SHOULD ALWAYS SWITCH! Crazy eh? Not really if you think about it in basic simple probabilistic terms.  Let's try. At the beginning of the Game, each door is equally probable to hide the car, so 1/3.  We really cannot do much about it, we ...

In the time of the Coronavirus COVID19, it is useful to have a look at the mathematics of epidemics. On a sad note, Bill Gates got it definitely right.... 5 years ago!

I didn't know tumbleweed was such a huge problem! Another very interesting video by CGP Grey!

These are some interesting and sometimes distuburbing facts about Ducks....

I tried and it works! It take just some practice and mnemonics:) Some extra info: https://ruwix.com/the-rubiks-cube/how-to-solve-the-rubiks-cube-beginners-method/ And for the lazy ones... https://ruwix.com/online-rubiks-cube-solver-program/

Interesting tips! I have to change my coffee-routine too!

This is a pretty interesting strategy. If we try to be too hard on ourselves, we are going to fail. I like the idea to have a theme  :)

There was a time, when dedication and patience (a lot of it!) could overcome immature/pioneering technologies. And prevent wars too! Somehow difficult to understand today.

I have always wondered it  :)

Another wildly intersting video from  Sabine Hossenfelder :) 

I asked myself the same question...

Fascinating, simply fascinating :)

This is cool!

An interesting Video from Cheddar :) Enjoy!

Do you remember The Addams Family? And their House?  If so, you will find this little fun fact quite interesting :) Enjoy!