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ichthyologist:

Mud-Puddling Butterflies

To supplements salts and amino acids, many species of butterfly drink water from mud or rotting matter. This is because nectar lacks many of the minerals and nutrients needed for proper physiological functioning. Some species even supplement their nutrients with dung or carrion.

Geoff Gallice, chinmayisk on Flickr

(via scienceyoucanlove)

mathhombre:

spring-of-mathematics:

Type of Spirals: A spiral is a curve in the plane or in the space, which runs around a centre in a special way.
Different spirals follow. Most of them are produced by formulas:The radius r(t) and the angle t are proportional for the simplest spiral, the spiral of Archimedes. Therefore the equation is:
(3) Polar equation: r(t) = at [a is constant].
From this follows
(2) Parameter form:  x(t) = at cos(t), y(t) = at sin(t),
(1) Central equation:  x²+y² = a²[arc tan (y/x)]².

You can make a  spiral by two motions of a point: There is a uniform motion in a fixed direction and a motion in a circle with constant speed. Both motions start at the same point. 
(1) The uniform motion on the left moves a point to the right. - There are nine snapshots.
(2) The motion with a constant angular velocity moves the point on a spiral at the same time. - There is a point every 8th turn.
(3) A spiral as a curve comes, if you draw the point at every turn(Image).

Figure 1: (1) Archimedean spiral - (2) Equiangular Spiral (Logarithmic Spiral, Bernoulli’s Spiral).
Figure 2 : (1) Clothoide (Cornu Spiral) - (2) Golden spiral (Fibonacci number).

More Spirals: If you replace the term r(t)=at of the Archimedean spiral by other terms, you get a number of new spirals. There are six spirals, which you can describe with the functions f(x)=x^a [a=2,1/2,-1/2,-1] and  f(x)=exp(x), f(x)=ln(x). You distinguish two groups depending on how the parameter t grows from 0.

Figure 4:  If the absolute modulus of a function r(t) is increasing, the spirals run from inside to outside and go above all limits. The spiral 1 is called parabolic spiral or Fermat’s spiral.
Figure 5: If the absolute modulus of a function r(t) is decreasing, the spirals run from outside to inside. They generally run to the centre, but they don’t reach it. There is a pole.  Spiral 2 is called the Lituus (crooked staff).

Figure 7: Spirals Made of Line Segments.

Source:  Spirals by Jürgen Köller.

See more on Wikipedia:  SpiralArchimedean spiralCornu spiralFermat’s spiralHyperbolic spiralLituus, Logarithmic spiral
Fibonacci spiral, Golden spiral, Rhumb line, Ulam spiral
Hermann Heights Monument, Hermannsdenkmal.

Image: I shared at Spirals by Jürgen Köller - Ferns by Margaret Oomen & Ferns by Rocky.

Spiral compulsion. But this is a handy reference.

(via adventuresinchemistry)

(Source: crutal, via foreveralone-lyguy)

freshphotons:

"In this page from Dr. Peter Novick’s lab notebook, he shows the data that clinched the discovery [of protein secretion which led to the Nobel Prize in Physiology or Medicine in 2013], proving that the mutant strain accumulated enzymes inside the cell that it normally would have secreted past the membrane.” Via (Paywall).

(Source: dystopianboy, via sighwah)

underthesymmetree:

Fibonacci you crazy bastard….

As seen in the solar system (by no ridiculous coincidence), Earth orbits the Sun 8 times in the same period that Venus orbits the Sun 13 times! Drawing a line between Earth & Venus every week results in a spectacular FIVE side symmetry!!

Lets bring up those Fibonacci numbers again: 1, 1, 2, 3, 5, 8, 13, 21, 34..

So if we imagine planets with Fibonacci orbits, do they create Fibonacci symmetries?!

You bet!! Depicted here is a:

  • 2 sided symmetry (5 orbits x 3 orbits)
  • 3 sided symmetry (8 orbits x 5 orbits)
  • sided symmetry (13 orbits x 8 orbits) - like Earth & Venus
  • sided symmetry (21 orbits x 13 orbits)

I wonder if relationships like this exist somewhere in the universe….

Read the Book    |    Follow    |    Hi-Res    -2-    -3-    -5-    -8-

(via visualizingmath)

(Source: awakeninqlove, via sceptre)

dion-thesocialist:

Christian Bale is going to play Moses and where oh where are all the white people who are always so angry about race bending and historical accuracy??? Where are you??? Why are you not outraged??? I thought movies had to be historically accurate and races should never change from the source material???

(via variine)

My heart is still beating for you Myself in DNA Top of the food chain

saelifeworks:

This project started out as a way to multitask between my Bio courses and Art projects. Now I’m ready to commit more to this series and hopefully will have more pieces done over the summer. Check it out on Behance:

https://www.behance.net/gallery/17798183/Mixed-Media-Biology-Posters

(via themedicalchronicles)

(Source: cruaute, via milesjai)

molecularbiologistproblems:

misbehavedscientist:

Here’s a few of the many many genetic disorders that can occur!

Don’t forget ataxia telangiectasia! Okay, I might be a tad bias because it’s what I published lol.

(via medicalexamination)

antique-anatomy:

Bossu, Antonin, 1809-1898

(via thisfuturemd)