If someone ever asks you what Tumblr is, just show them this picture.

1/16th Native American

A Native American sends smoke signals in Montana, June 1909.Photograph by Dr. Joseph K. Dixon, National Geographic Creative



(via loserpoet)


"Yeah bae i can take it"


*sticks the tip in*


(Source: abcnewsofficial, via suburban-auschwitz)

We shall not cease from exploration
And the end of all our exploring
Will be to arrive where we started
And know the place for the first time.
- T.S. Eliot (via finegoodsandfinefolks)

One of the best teacher’s I’ve had said this to me at the conclusion of my two years studying American History

(Source: lazyyogi, via inhabitude)


i judge people based on their opinion of yeezus (the album)

(via welovekanyewest)

The brachistochrone
This animation is about one of the most significant problems in the history of mathematics: the brachistochrone challenge.
If a ball is to roll down a ramp which connects two points, what must be the shape of the ramp’s curve be, such that the descent time is a minimum?
Intuition says that it should be a straight line. That would minimize the distance, but the minimum time happens when the ramp curve is the one shown: a cycloid.
Johann Bernoulli posed the problem to the mathematicians of Europe in 1696, and ultimately, several found the solution. However, a new branch of mathematics, calculus of variations, had to be invented to deal with such problems. Today, calculus of variations is vital in quantum mechanics and other fields.