cornchipz:

awkwardcontent:

Fun fact: Humans are deuterostomes, which means that when they develop in the womb the anus forms before any other opening. Which basically means at one point you were nothing but an asshole.

some people never develop beyond this stage

(via haleizm)

captorquest:

one time in freshman year my biology teacher was teaching us about chromosomal disorders and apparently some women can have three X chromosomes and she went to go look up some pictures of what some women afflicted with this condition look like. unfortunately my teacher typed in “XXX females” and that worked about just as well as you’d expect

(via tit-picnic)

memewhore:

readalot413:

liverpate:

azraeldoesnotdispute:

liverpate:

why am i not a banana

Because your genetic code dictates that you are human. However, it should please you to know that you share 50 - 60% of your DNA with a banana.

thanks man

are you telling me that some people are 10% more banana than other people

Gwen Stefani is.

(via yoursmilewillevademe)

1ucasvb:

Different modes of oscillation for a pendulum

The period of a simple pendulum is not a trivial thing, and it depends on the initial conditions.

Shown here are ten different modes of oscillation for the same pendulum. The only difference is the total amount of mechanical energy in the system.

As a result, each one has a completely different period of oscillation, unlike what the small-angle approximation (as taught in high-school) would suggest. They can’t be in sync. You may see some really interesting patterns based on the delay between them in your browser.

The red graph above each pendulum represents the phase portrait for the respective mode of oscillation, with the current state marked as a blue dot. The horizontal axis represents angle (hence why it wraps around the sides) while the vertical axis represents angular velocity.

Pendulums are very interesting dynamical systems, as they are relatively simple to understand but can produce surprisingly complex results in certain cases, such as the chaotic behavior of double pendulums and the odd behavior displayed by coupled pendulums.

scinerds:

The Father of All Men Is 340,000 Years Old

A change in the way we understand the root of the tree where Y chromosome originated from has left geneticists amazed

Albert Perry carried a secret in his DNA: a Y chromosome so distinctive that it reveals new information about the origin of our species. It shows that the last common male ancestor down the paternal line of our species is over twice as old as we thought.

One possible explanation is that hundreds of thousands of years ago, modern and archaic humans in central Africa interbred, adding to known examples of interbreeding – with Neanderthals in the Middle East, and with the enigmatic Denisovans somewhere in southeast Asia.

Perry, recently deceased, was an African-American who lived in South Carolina. A few years ago, one of his female relatives submitted a sample of his DNA to a company called Family Tree DNA for genealogical analysis.

Geneticists can use such samples to work out how we are related to one another. Hundreds of thousands of people have now had their DNA tested. The data from these tests had shown that all men gained their Y chromosome from a common male ancestor. This genetic “Adam” lived between 60,000 and 140,000 years ago.

All men except Perry, that is. When Family Tree DNA’s technicians tried to place Perry on the Y-chromosome family tree, they just couldn’t. His Y chromosome was like no other so far analysed.

—

“The Y-chromosome tree is much older than we thought,” says Chris Tyler-Smith at the Wellcome Trust Sanger Institute in Hinxton, UK, who was not involved in the study. He says further work will be needed to confirm exactly how much older.

“It’s a cool discovery,” says Jon Wilkins of the Ronin Institute in Montclair, New Jersey. “We geneticists have been looking at Y chromosomes about as long as we’ve been looking at anything. Changing where the root of the Y-chromosome tree is at this point is extremely surprising.”

(via NewScientist)

(Source: troll-rockeiro, via heyfunniest)

medicalschool:

There’s a dancing gorilla in this CT scan — and 80% of the radiologists asked didn’t spot it
The image above has a dancing gorilla in it, but 20 out of 24 radiologists couldn’t see it in a psychological study administered by Brigham and Women’s hospital. The study, which appears in this month’s Psychological Science, tested the eyesight of 24 radiologists with the best credentials.

These radiologists were asked to look at a five typical lung cancer screenings — four of which were gorilla-free — and in the stack of screenings from the fifth patient was the dancing gorilla, waving his arms in the top right hand corner of the scan. The radiologists in the study ran their eyes over the scan four times on average. (Trafton Drew/Brigham & Women’s Hospital, Harvard Medical School)

(via scinerds)

kiratsukai:

digg:

Don’t put CDs in the microwave.

unless you want them TO LOOK AWESOME

(via potionwolf116)

apsies:

…for science.

(Source: theravennest, via potionwolf116)

heyfunniest:

so that’s how keys work.

(Source: onlylolgifs)

(Source: idtrees, via scinerds)

That carbon monoxide one I didn’t know. That’s kinda cool, because that means NASA is the reason I am still alive…

(Source: pennyfournasa, via scinerds)

(Source: clanarmstrong, via unneces-sarah)

(Source: shavingryansprivates, via haleizm)

jtotheizzoe:

Neil deGrasse Tyson, Olympics Commentator

Doin’ his NdT thing for the Interplanetary Olympics of the year 2320 (or something). So much more awesomeness, as if he produced anything else, on his Twitter feed.

shuttlecock to the face

(via goblinparty)