Aug 27th, 2014
"[…] The only reason that we are working with the data in this way is to provide an example of linear regression that does not use too many data points. Do not try this without a professional near you, and if a professional is not near you do not tell anybody you did this. They will laugh at you. People are mean, especially professionals."
— K. Black’s R tutorial, which is good.

(Source: cyclismo.org)

Apr 15th, 2013
natureofnature:

Confocal micrograph showing the expression of different fluorescent proteins in the stem of a thale cress seedling (Arabidopsis thaliana).


Varying expression states in a cress stem
Mar 12th, 2013
The development of insect mouthparts from the primitive chewing mouthparts of a grasshopper in the centre (A), to the lapping type (B) of a bee, the siphoning type (C) of a butterfly and the sucking type (D) of a female mosquito. Legend: a, antennae; c, compound eye; lb, labium; lr, labrum; md, mandibles; mx, maxillae hp hypopharynx.
Mar 10th, 2013
I believe a responsible, sustainable, and intelligent society is in control of its growth and reproductive health.
Mar 10th, 2013
movingthestill:

Title: ExponentialArtist: Mars Dolschon
Mar 10th, 2013
Jan 10th, 2013
Jan 3rd, 2013
Two legged skink! Skinks as a family tend to being slender, elongated and sometimes having atrophied limbs. This guy bucks the trend though:

Two-legged lizard (Jarujinia bipedalis). This extraordinary two-legged skink was discovered in Suan Pung district, Ratchaburi province in central Thailand. It is the first skink (and only the second species of terrestrial reptile in the world) to have forelimbs but no hind limb 

: other species of skink retain hind-limbs, but have lost the front set.
   I take this to mean this bipedalism is analogous (looks similar, but is crucially distinct) to that of bipedalism in other skinks; and not that both types of bipedalism are the result of one homologous (both the result of the same original process) mutation producing different results down the line.
   I imagine there’d be a lack of surprise were anyone to show many of these limb-loss skink stunts were the result of several, individual acts of convergent evolution. 

(via the guardian) 
Dec 20th, 2012
Optical coherence tomograph of the fingertip.
OCT is a scanning method that follows the diffusion of photons through thin tissues, allowing us to view the different layers based on the degree to which they scatter light a t a really cool resolution. 
Nov 6th, 2012
rhamphotheca:

The Real Question Is… Who Didn’t Have Sex With Neanderthals?
by Charles Choi
The only modern humans whose ancestors did not interbreed with Neanderthals are apparently sub-Saharan Africans, researchers say.
New findings suggest modern North Africans carry genetic traces from Neanderthals, modern humanity’s closest known extinct relatives.
Although modern humans are the only surviving members of the human lineage, others once roamed the Earth, including the Neanderthals. Genetic analysis of these extinct lineages’ fossils has revealed they once interbred with our ancestors, with recent estimates suggesting that Neanderthal DNA made up 1 percent to 4 percent of modern Eurasian genomes. Although this sex apparently only rarely produced offspring, this mixing was enough to endow some people with the robust immune systems they enjoy today…
(read more: Live Science)               (image: NASA/JPL-CalTech)