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Excellent channel about mathematics and a great storyteller (Matt Parker). In the first video below, he talks about a cool paradox with multidimensional spheres (don’t worry, it’s all simple). In the second – about the mysterious number 10958 (+ solution to this number’s problem in a separate video)

https://www.youtube.com/watch?v=mceaM2_zQd8

https://www.youtube.com/watch?v=-ruC5A9EzzE

At every corner and along the streets of Richmond’s university campus, there are many cameras. There are thousands of them here. At this corner, there are eight. It seems the goal was the complete absence of blind spots and, judging by the infrared lighting, they operate even at night.

The same pianist, many years apart. Both videos are masterpieces

https://www.youtube.com/watch?v=ci4CQlRSBEs

https://www.youtube.com/watch?time_continue=277&v=gYtybgToH2Q

On the reception desk of the hotel, I see a reservation from Expedia, a fax with a copy of their card, number, security code, and their travel department’s card. Curious, how is this possible? It’s the 21st century. Expedia did a good job, sorting out the issue “we have no rooms, although we see you had reserved a room”

Expedia has booked a room for us. I arrived at the hotel and found a fax copy of the reservation on the receptionist’s table. It includes a copy of Expedia’s card, the full card number, and security code… interesting, is it safe?

Thanks, Expedia, you successfully resolved the issue with “all rooms are booked in the hotel your client reserved a week ago”

The book hasn’t decided on the reader’s language

In that very bookstore, there’s a huge section with handwritten reviews from the store owners. Handwritten!

A shelf with banned encounters and blind date with a book. You pay for a pig in a poke) banned encounters – books that are banned from libraries and bookstores. What kind of books they are is not revealed until purchased)

Do not enter without knocking

The first rule of a good interface: explain why someone should do something (enter an email or check a box) or not do it (do not touch the furniture, turn off the mobile phone, or maintain silence). In our country, people don’t understand why embassies or airplanes require turning off mobile phones, yet you can’t touch exhibits in a museum with hands. This is because it’s not explained.

So that’s what you are, northern reindeer!