The Perception of Colors

Intro
This post is going to be more of a rant than an informational essay. I'm going to talk about the perception of colors and why it boggles my mind, and I'm also going to give some demonstrations (AKA pictures) to reinforce my point. I'm done talking about what I'm going to talk about, so let's get on with it, shall we?

What is Perception?
The definition of perception is "the ability to see, hear, or become aware of something through senses". However, the definition I'd like to focus on is "a way of regarding, understanding, or interpreting something; a mental impression". This definition talks about what I want to talk about today.

The Perception of Colors
See that picture below here? To me, that picture is representing the color green, but in your case, it might be representing the color blue, red, or maybe you see green too. That's called the perception of colors. You know how sometimes you and your peers argue about the color of something? Like, "That's red!", to which they respond, "No! That's pink!". That's because their pink is your red, and your red is their pink. Isn't that crazy!

The Perception of Illusions
The same can also go for illusions. The picture below here shows and elephant, but how many legs does it have? You may have seen this before, as it's one of the most famous illusions ever made. For some people, they might say the elephant has five legs. Some would even say three. For others, they might stick to what they know is right and say four. Well, you might be surprised to know that they're all right, to you, however, but not for others. Again, that's perception. Mind boggling, huh?

The Perception of Yourself
You might see yourself differently than others see you. Did you know that you see yourself up to five times prettier than you actually are? That's called self perception. That kitten below here sees himself as a mighty lion, but you see him as a kitten. It's the same concept.

Perception
The bottom line is that perception is really, really cool. I could spend all day thinking about it.

Black Holes: Is Earth at Risk?

What are Black Holes?

A black hole is a region of space-time from which gravity prevents anything, even light, from escaping. Black holes are formed by certain dying stars. A star with a mass of about 20 times more than our sun may produce a black hole at the end of it's life. Using Newton's Laws in the late 1790s, John Michell of England and Pierre-Simon Laplace of France suggested the existence of an "invisible star". They calculated the mass and size that an object needs to have in order to have an escape velocity greater than the speed of light. We now call this the "event horizon". In 1967, John Wheeler was the first to use the term "black hole" to describe these collapsed subjects.  Black holes are surrounded by something called an ergosphere in which it is impossible to stand still. This is the result of "frame-dragging". General relativity predicts that any rotating mass will tend to slightly "drag" along the space-time surrounding it.

What do Black Holes do?
Black holes can "suck in" matter around it. Once matter comes in range of the event horizon, it's over. The black hole consumes it and rips it to shreds. 

Black holes are dangerous, but a human has never died from a black hole. It is currently unknown what exactly happens when you enter a black hole but it is theorized that if you went through a black hole you would come out in another dimension or region of space. Most scientists, however, believe that you go nowhere. You just become highly compressed plasma that is forever trapped inside a black hole. If two black holes collide with eachother, they just become one black hole that has the combined mass of the two.

Is Earth at Risk?
Scientists believe that our sun is not at risk of becoming a black hole anytime soon. Even if by some stretch of the imagination our Sun explodes and becomes a black hole, the Earth and other planets will continue to orbit because they are not in the event horizon. Scientists have also discovered a black hole at the center of our galaxy, "the Milky Way". It is currently near the constellation "Sagittarius A".

Don't worry, though, because our solar system is not anywhere near the center of our galaxy. It's safe to say that Earth is not at risk of black holes anytime soon.

Scorpions: Friend or Foe?

Basic Information
Scorpions are one of earth's oldest predators. There are about 1,500 different species of scorpions to date, and only a few can be lethal to humans. They are nocturnal, which means they only come out at night. When it comes to scorpions, the bigger they are, the less deadly they are. Scorpions inhabit every continent except Antarctica. Despite their reputation, scorpions usually only sting as a last resort.

Deadly Scorpions
Out of the 1,500 species of scorpions, only a few are lethal.

The Indian red scorpion is considered the deadliest throughout the scientific community. It inhabits India and nearby countries. It's tiny, but it packs quite a punch. Their venom primarily affects the cardiovascular and pulmonary systems.

The Arizona bark scorpion can possibly be another deadly scorpion. It resides in the southwest United States and Mexico. It's venom primarily affects children, but there is a vaccine for it's sting.

The deathstalker scorpion is also a deadly scorpion. It's venom is comprised of many neurotoxins. Death is usually caused by the build up of fluid in the lungs.

These are only some of the scorpions that are lethal to humans, but there aren't many more.

Friend or Foe?
Overall, scorpions aren't nearly as big a threat as we make them out to be. Only a handful are deadly to humans, and the rest of them just hurt, but you won't die from their sting.