The great pyramid of Giza,due to its historical fame, is worth its weight in gold.


Standing at an impressive 139 meters, the great pyramid of Giza was the highest man made structure for over 3000 years, but time took its toll, and after years of earthquakes and plundering, things aren't so smooth anymore. Nevertheless, its historic worth only grew with time, and currently, the stones of the pyramid are worth their own weight in gold, but don't you try grabbing some of it, as the punishment Egyptian courts will offer you for that is death by hanging...

London: City with the most tri-colored beards



The world of tri-colored beards is a diverse one. Some tri-coloring is more obvious while others are rather subtle.
But what about geographic trends, which city gets the most tri-colored beards per capita?
As it turns out, this crown of multi-colored glory goes to London, the capital of the United Kingdom. Who knew?
But let's get to the numbers, 22.7% of beards there, are made out of three or more obvious colors, that's 4.4% more than the next city on the list, Salzburg in Austria, which scores a 'mere' 18.3% percent total tri-colored beards.

(Source: PEF research)

Cats don't see your red laser light as red.

Did you ever see a cat chase a laser? If you did, then you've probably noticed how much excited  they can get, they want to catch it, they NEED to catch it, but they want it caught as a 'real physical' object, something they can feel, if they get it under their paw, and the laser light gets turned off, the cat wonders where the hell it went. She didn't even feel it, it doesn't seem fair!
Nevertheless, the cat never gives up hope, 'one day I'll get it' she thinks. After all, it's moving around so it's definitely catch-able, and why should she know otherwise?
It's fascinating stuff how a cat is built to be extra sensitive to any moving object, that's what gets them to their prey.
But it gets a bit weirder here, because cats won't see a red or pink laser light as red nor pink, rather they see it as grey-ish, and that's because cat's eyes miss the cones in their eyes needed to see reddish colors, but this actually works out quite well, because the laser dot is the same color as a mouse! The cat's ultimate toy, better and bigger than a laser light and very importantly, you can at least catch it!

Bonus fact: cats see better when things are at further distance from them, things which are nearer seems more blurred to them, in fact, they have such binocular-grade eyes that they can see sharply at 200 miles away, whereas humans can't even see properly past 50 miles if the object isn't illuminated.

Eiffel tower: A utility tower turned into structural art?

Did you ever wonder why the famous Eiffel tower looks so strange and doesn't really serve any purpose?
Wonder no more, because the Eiffel tower was supposed to serve some purpose but it didn't end up doing that. What purpose exactly?
Well,  the Eiffel tower was originally planned to be built as an electric utility station, not just to carry electricity but also to produce it.

Why so tall?
That's because, back in those days, some scientists believed that electric efficiency would be greatly increased if the tower would be sending electricity 'rushing down' the wires due to the force of gravity, it was also thought that this downward movement would create much more electricity along the way, due to the friction in the wires.

So what went wrong, why wasn't the tower-station fully imagined?
That's because, what happened was that the project never received proper funding and after years of slow or no progress at all, the city of Paris had already grown in the meantime by leaps and bounds, and.. they've already found a much cheaper and easier way to transport its electricity to its suburbs, not to mention that there were now too many skeptics in its alleged electricity production capabilities.
But the tower planners weren't about to give up on it, especially since they had already invested so much in it, the grants were already given and the contract was never cancelled, so they started the construction process, focusing on its grand height and artistic qualities and leaving out the electric parts, and despite the protests of many artists and intellectuals of the time who hated the tower, they weren't about to change the design, oh no, they remained stubborn with their original plans, and after its completion in 1889, everyone in Paris looked up in wonder on this beautiful but strange 300 meter tower, a failed electric project, successfully passed off as modern industrial art.



Original plan