useless facts

[Jimbuna]

Humans share about 50% of our DNA with bananas.

[Tango589]

Originally Posted by Jimbuna

Humans share about 50% of our DNA with bananas.

I've met some people who I reckon share more than 50%.

[Aktungbby]

Originally Posted by Jimbuna

Humans share about 50% of our DNA with bananas.

I've often shared my DNA with a big banana!

[Platapus]

In the noun Pacific Ocean, all three instances of the letter C are pronounced differently.

[Tango589]

We perceive a sonic boom as sound but it isn't; its an overpressure. Air can travel at maximum speed -a speed that We have come to know as the speed of sound. The speed of sound is fixed - although its absolute value varies depending on temperature and altitude - because there's a limit to how fast air molecules can get out of the way of an object.On a standard day, at sea level static conditions, the speed of sound is around 760 mph or 1,100 feet per second.

The reason the speed of sound is referred to as a barrier is because - in a supersonic aircraft - air molecules are being compressed and they can't get out of each other's way fast enough. In the end, in effect, they form a wall. The air molecules pushed from the path of a Boeing 747 get out of each other's way with comparative ease because the aircraft is moving relatively slowly.

But when a super sonic aircraft begins to punch through the wall, something odd happens - the molecules form into a cone-shaped bow-wave. Concorde's overpressure was around 2.5 pounds
per square inch, but this, too, depended on the temperature of the air, and the speed and altitude at which the aircraft was flying.

There's another misconception about sonic booms- that they only occur when an aircraft goes through the sound barrier. In fact, the boom is sustained it's happening all the time the aircraft is going faster than Mach 1. The cone that reaches a ground observer is heard as a boom that is what those 2.5 pounds of pressure feel like to eardrum. Their intensity will depend on distance, because overpressure dissipates - just as the wake of a boat does. The further you get from the source, the more it weakens.

Concorde's, however, was considered sufficiently intense for it not to be allowed to fly over land, apart from over very, very sparsely populated areas. There was a reason for this. Concorde's capacity to crack the odd window or break a piece of china.

A second cone came off the aircraft's tail as the air decompressed.This was so close behind the first, however, that it was very often missed but it was there a force of nature; undeniable and unavoidable.

By : Mike Bannister ~ Former Concorde Chief Pilot

#SupersonicBoom 💥💥💥

[Jimbuna]

The smallest cell in a man’s body is the sperm cell.

[Rockstar]

Just before he died, Arthur Stanley Jefferson a.k.a Stan Laurel told his nurse he would like to go skiing. The nurse said, "Are you a skier, Mr. Laurel?" He replied, "I'm not, but I'd rather be doing that than having these needles stuck in me." A few minutes later he died

[fireftr18]

Originally Posted by Ostfriese

When whiskey is stored in warehouses to undergo aging alcohol vapors emerge from the casks. The amount of alcohol is enough to make you tipsy by just walking through the warehouse.


The Irish call the alcohol vapors "Angel's share".

Kentuckians call it the "Angel's share" also. And, yes, you do feel the effect after walking through a warehouse. Of course the aging barns can hold thousands of barrels.

[Jimbuna]

Originally, carrots were a purple colour.

[Tango589]

Originally Posted by Jimbuna

Originally, carrots were a purple colour.

The orange carrots were cultivated by the Dutch, as orange is their national colour.

[Platapus]

Originally Posted by Jimbuna

The smallest cell in a man’s body is the sperm cell.

And coincidentally, the largest cell in the human body is the Ovum

[Jimbuna]

The U.S. government only owns ⅓ of the land its country has.

This is around 2.27 billion acres and is approximately 33% of the total land. However, the United States is the only country whose government owns more than 25% of its land.

[Rockstar]

France’s longest border is shared with Brazil

[Platapus]

All the hadrons are composed of quarks, whereas leptons are material particles not containing quarks.



But that's just stating the obvious.

[Jimbuna]

Mars appears red to the human eye due to the iron oxide particles that suspends its atmosphere.