WHY does black absorb more heat than other colors?

According to the physical laws, the color of any object is a spectrum of reflected light. Any object absorbs all waves, but reflects only those of a certain wavelength.

Only black reflects nothing. It represents the absence of light. Thus, all the light and thermal energy that enters it, remains inside of it.

WHY can't cats get down from a tree on their own?

The thing is that a domestic cat's claws are curved on the inside. That enables it to climb up the trunk of a tree deftly. But the claws cannot support the animal as it descends.

If a person does not come to the aid of a "stuck" cat, it descends exactly forward with its tail or jumps.

WHY do the Germans read numbers backwards?

By the end of the 15th century, Arabic numerals became common in written German. They were recommended to be read from left to right. But when numbers didn't exist, the Germans always wrote units first (one dash for 1, two dashes for 2) and only then - tens (X - 10).

As an example, the notation IXX used to read "one and twenty".

The Germans still have such a peculiarity. Previously, writers and mathematicians were constantly pointing out the problem of the distorted transmission of numbers. But all their attempts to do anything about it were suppressed from above.

WHY does intelligence affect marital fidelity?
Throughout evolution, the polygamous male nature is gradually replaced by monogamy.
Highly intelligent men tend not to cheat as they subconsciously realize that monogamy is the most advantageous option for a relationship with the opposite sex.

WHY does the voice change with helium?
When you inhale ambient air, your vocal cords vibrate in "normal" mode.

However, helium has a lower density, around 7 times lower than air. As a result, the vocal cords are less strained and vibrate at a higher frequency. The voice becomes higher and more squeaky.

And if you inhale a heavy gas, such as sulfur fluoride, which is five times heavier than air, even a 7-year-old girl will start to speak in a bass.

WHY did the church conclude that the fork was a tool of the devil?At one point, Christian theologians in Europe declared that the fork was "Satan's fork".Perhaps it was the medieval denial of all things ancient. Since the culture of ancient Greece was based on belief in multiple gods, Christian preachers saw the cutlery as a mini-trident of Poseidon, god of the sea.

For centuries, the Catholic Church did not allow the use of a fork. When the French queen Jeanne d'Herve, who treasured her only fork, died of the plague in the fourteenth century, churchmen called her demise payback for her reckless fondness for the devil's object.

Only by the 16th century did the fork overcome Catholic prejudice. And in 1630 Governor Winthrop of Massachusetts had the first and only fork in colonial America.

WHY does each flower have a different scent?

To attract the right insects.
Almost all fragrant flowers are pollinated by insects. Plants benefit from pollinators visiting one flower and flying to another one.

Then the flowers will get pollen of their own kind, not someone else's. To this end, flowers have features that help insects recognize them: shape, coloration, and, of course, smell. It can include substances that are attractive to the "right" pollinators.

WHY is the air composed of 78% nitrogen?It's because it is chemically inert. The nitrogen atoms in the N2 molecule are connected by a triple bond. It's so hard to break that nitrogen doesn't enter into chemical reactions well, and the Earth's gravity prevents it from escaping into space.

So there is simply nowhere for nitrogen to escape from the atmosphere. How it got there is unclear to the end. In the protoplanetary nebula, nitrogen was mainly in the form of ammonia. The ammonia of the Earth's primary atmosphere must have been broken down by the oxygen released by the first plants.

And the ammonia stored in the mantle releases nitrogen into the superheated aqueous environment where the lithospheric plates move up. The gas is released into the atmosphere by volcanoes.