An overwhelming lack of common sense exists in a species that is consider so superior.

Their capacity to kill on a large scale.

Knowing it is a very thin line between genius and insanity.

Actually, I was thinking our sense of always being able to evolve in someway; can be frighting or a blessing depending on the situation. Being able to use coping skills are the middle ground, huh? ;)

That they knowingly kill their own. Most animals don't even do that.

We destroy our environment.

well americans. That we elected a moron for president.....then guess what!? we re-elected the same damn ape again!

The loss of common sense :)

there face lol jp

Our propensity to commit violence while blinded by certain ideals...w/o feeling. They have been deemed the enemy so it does not matter, ect...

The destructive power in the massess of men, outweigh the milk of human kindness inate in mankind.

Our ability to kill for sport.

Binge eating ...lol :) !

How we could probably end the world right now if the right buttons were pushed...

They can be extremly harmful to themselves and others..

Can have a mood swing and even a complete change any moment.

teeth. sounds a little weird but teeth can be scary to look at sometimes

Our desire for power and the fact that we have lost sight of where we fit into the circle of life.

we kill and fight with each other

The fact that they, er...I mean WE, are so divided and argumentative amongst themselves, er...I mean OURSELVES. They, er...WE, are also demonstrably short sighted with respect to their, er...OUR future as a species. In fact, very little of their, er...OUR, long term accomplishments and goals were accomplihed without some type of imminent crisis which HAD to be dealt with right then. Also, a great tendency for most of their, er...OUR, human population to think no further than their own noses and to readily be blindly lead around by those in positions of power instead of researching the truth. Like: 1. War in general 2. Putting a man on the moon (direct result of a space race sparked by possible military ramifications from an opposing nations actions) 3. Medical and science advancements (until very recently, historically speaking. Many such advancements in the past were stomped into the ground by those who felt threatened by them, whether for religious, political, or other reasons) 4. Just about ANY election (Wild and heated accusations fly around from ALL sides, like flies around a pile of sh*t.) I could name more, but you get the picture!

Their inhumanity.

The capacity to Love and at any given moment take that love away or break your beautiful heart into a million little pieces, sweep them up and keep them in a glass jar that sits atop the television....

That humans are the most intelligent beings on this planet... I mean if that's the best we've got, no wonder the aliens haven't landed.

Someone called me an animal... I spat back saying "no..worse... I am human"...

Well some of them are seriously f*cked in the head like hello, read the paper and watch the news.

That we're so smart yet so stupid at the same time.

i would say emotions. We don't know what some of the emotions are. Emotions can drive us to do anything. thanks for the question Jay. miss you tonz xoxoxo

Stupidity...people can do very, very stupid things

The fact that we think we can control or "fix" everything.

their primitive violent nature combined with deadly technology capable of destroying the earth a million times.

Our capacity to do great harm.

That we have an insatiable hunger for power. The more civilization progresses, the less civilized we become.

...Humans have a way of wanting to be ignorant. ...Our individuality and personal meanings in life can and will always cause incredible chaos. ...The way we love is either passionate and violent or it is cheap and useless.

Their trigger finger.

The common perception that love is so magnificent and peace the ultimate goal for the society of mankind.

that one person a really long time ago must have been the inventor of human sex.

Our sheer vulnerability when we are babies. During our formative years, others potentially have the ability to permanently scar us.

When I see them on the road driving to work with a newspaper on their lap, with a cell phone pinned to their ear, and a cup of coffee in their right hand: it doesn't get much scarier than that. Maybe they use their noses to beep their horns.

The way [some] people hurt others for being different.

Their love and hate. Both can kill.

That they are humans....

The thin line that exists between love and hate.

the fact that they can use something you are sensitive about to hurt you for their own amusement.

How emotions can make people act. And also our fear of things that are different.

The over super size ego never stop trying to get bigger and more deadlier.

Greed...It's what mainly motivates ''human beings'' nowdays....More money, more power no matter what the cosnequences are.

the ability we have for inaction and our capacity for denial.

Killing each other!

Political tyranny.

you cant tell whats on the inside (in their mind) by looking at the outside, you never know if you are standing next to a psycho !!!

Evil intent.

Religion.

The most frighteining thing is we dont care about killing each other we are the same species,and shouldnt do this.

That you really cant know what someone is thinking or what they are capable of. There are just so many layers to people. Who knows?! I guess thats what makes us interesting tho.

Rage.

The lack of a slime membrane- it's a wonder they don't just dry up and fly away!!

That they're no better than the fiercest animals of the jungle. Moreover, they are much better armed, and often grossly misuse them. We also love to delude ourselves that we are "civilised", and, therefore, superior to the rest of the creation. I think religions -- all of them -- have misled us into thinking this way.

they don't listen

their willful ignorance of the value of other people.

Their inhumanity?! ;-)

How tasty they are with BBQ Sauce

hate and not caring about others!

Some of the thoughts that they can have or have the ability to have.

The idea that we could kill us all within a day, and we still haven't.

We think we're smarter than we actually are.

Our capacity to become increasingly and refiningly wicked, lacking any compassion or desire for the truth.

Our ability to think.

Their ability to be devoid of sorrow.

the most frightening thing about humans is knowing that they can manipulate an innocent being and use them to their advantage or downright abuse them just cuz they can. an example would be the Stanford prison experiment or wut happened in abu ghraib prison. makes me pessimistic about the future of humans.

Their selfishness

greed, and lack of collective conscience.

the human brain that brews up designs to ruin humans too

Wrath

That you could never think of a "most frightening thing" without being able to top it at some point. Amazing.

That unlike animals, we kill one another for reasons other than food for survival...and the fact that we have opposable thumbs to help us do so.

the fact that they are reproducing so fast and places are becoming over populated, which is causing polution, which is leading to disease, which ends in death alot of the time. So maybe it's just the fact that they can kill.

The fact that a lot of technologoly in the world is made to make more destructive weapons for war.

That we are capeable of such evil

How a human being is capable of expressing themselves in so many emotion. Whether its for real or not. Whether its good or bad!

They can kill when ever they want!!!! :)

That which is not readily apparent.

The fact that they do so many psycho things! Mass murder and stuff, humans can be SO dangerous.

Thier duplicity. They'll smile and make nice just to get you closer...

...that people with IQs below PLANT LIFE--are allowed to reproduce!!!

Our capacity to do damage, to ourselves and our planet, without constraint or concern for the consequences.

THEIR IMPERFECT

Cruelty and Dishonesty.

That they can ask questions that lead nowhere

All of us are capable of evil.

THEIR IGNORANCE.

Their unpredictability.

FOR THE 2ND. TIME THEIR IGNORANCE

Their ability as individuals to believe that theirs is the only correct opinion. To have the ability to wish to convert others to it. To be prepared to go to extraordinary lengths to ensure that the ability they have is enshrined in fact whilst openly striving to prevent any and all others from exercising theirs.

We are completely nuts.