magictransistor:

Michael Wolgemut, Danse Macabre (Dance of Death), 1493.

magictransistor:

Michael Wolgemut, Danse Macabre (Dance of Death), 1493.

This was posted 3 weeks ago. It has 314 notes. .
planetaerium:

 ☆

planetaerium:

 ☆

This was posted 3 weeks ago. It has 130,943 notes. .

nevver:

Thousand mile long shadows

(Source: facebook.com, via planetaerium)

This was posted 3 weeks ago. It has 17,463 notes.

itschis:

David Rumsey Historical Map Collection

1850 Star Chart

(via aquarian-moon-child)

This was posted 1 month ago. It has 8,314 notes.

(Source: lthmath, via geometrymatters)

This was posted 2 months ago. It has 1,273 notes. .
illuminatizeitgeist:

Vesica Piscis and the Flower of Life

illuminatizeitgeist:

Vesica Piscis and the Flower of Life

(via serescosmicos)

This was posted 2 months ago. It has 3,737 notes. .
magictransistor:

Female IRA Fighter. County Armin, Northern Ireland. 1972.

magictransistor:

Female IRA Fighter. County Armin, Northern Ireland. 1972.

This was posted 2 months ago. It has 469 notes. .
gunsandposes-history:

An eruption on the volcano island of Gaua in the south Pacific, observed from the International Space Station, May 2013.

gunsandposes-history:

An eruption on the volcano island of Gaua in the south Pacific, observed from the International Space Station, May 2013.

(Source: Slate, via traveler-wanderer)

This was posted 2 months ago. It has 16,572 notes. .

(Source: hexeosis, via hexeosis)

This was posted 3 months ago. It has 1,342 notes. .
quantumaniac:

Spiral of Theodorus
First constructed by Theodorus of Cyrene, the spiral (also called the square root spiral, Einstein spiral or Pythagorean spiral) is composed of contiguous right triangles. It is begun with an isosceles right triangle with each leg having a length of 1 - then another right triangle is formed next to it with one leg being the hypotenuse of the prior triangle and the other leg having a length of 1.Thus, each successive nth triangle has side lengths √n and 1, with a hypotenuse of √(n + 1).

quantumaniac:

Spiral of Theodorus

First constructed by Theodorus of Cyrene, the spiral (also called the square root spiral, Einstein spiral or Pythagorean spiral) is composed of contiguous right triangles. It is begun with an isosceles right triangle with each leg having a length of 1 - then another right triangle is formed next to it with one leg being the hypotenuse of the prior triangle and the other leg having a length of 1.Thus, each successive nth triangle has side lengths √n and 1, with a hypotenuse of √(n + 1).

(Source: quantumaniac, via thinksquad)

This was posted 3 months ago. It has 1,886 notes. .