from Japan

ikenbot:

neurosciencestuff:

A CT scanner uses radiation to produce a three-dimensional image of the insides of the human body. X-rays are fired through the body, and scanners pick up the path of the rays, leading to a detailed image of the body. It can be used to detect and diagnose epilepsy, Alzheimer’s disease, cancers, heart disease and medical issue.

Is it weird that I’m more familiar with the bottom scanner than with the top? We take these things apart almost on a monthly basis. Pretty fun since they kind of look like mini- particle colliders.

(via afro-dominicano)

1,196 notes

infinity-imagined:

The Digital Universe Atlas

(via yogatumblog)

5,453 notes

ikenbot:

Transit of Venus 2012 in Pictures

(Source: afro-dominicano, via it-am-i)

3,522 notes

ikenbot:

Transit of Venus 2012 in Pictures

(Source: afro-dominicano)

3,522 notes

tamejirou:

液体窒素とコーラかな?

tamejirou:

液体窒素とコーラかな?

(Source: ForGIFs.com, via fialux)

261,960 notes

jtotheizzoe:

smithsonianmag:

Never-Before-Seen Photos From the Early Days of Space Exploration

The Gemini astronauts also took some of the most memorable photos in NASA history. You’d think we would have seen them all by now. But with Nasa’s help and funding, a team of researchers at Arizona State University led by lunar scientist Mark Robinson has retrieved from the archives dozens of outtakes that never made it into wide circulation.

Photos: NASA

Ed note: Check out our friends at Air & Space for more stunning photos from the Gemini mission.

These are an absolute treasure. I don’t know if it was the tight quarters, lack of illumination, or the particular light characteristics of the Hasselblad 70mm cameras used on these missions, but they are equal parts spooky and beautiful. They capture the sort of terrifying, dramatic excitement that I imagine being one of the first men in orbit felt like. 

A little extra tidbit about spacewalk photos from this era: Those gas canisters you see in their hands as they exit the spacecraft? Those are called “zip guns”, and they were used to maneuver while outside the capsule. Sort of like when Wall-e rides the fire extinguisher through space.

5,565 notes

22 :名無しのひみつ:2010/03/22(月) 00:48:26 ID:ZI1K3JI6
生物には回転する器官がない、唯一の例外が鞭毛。なぜ足が車輪になっている生物がいないのかは謎。
そのへんを書いたSFがハイウェイ惑星、コブラでぱくられてるが…

86 :名無しのひみつ:2010/03/22(月) 17:28:22 ID:YSDPl1io
»22
それはアシモフが解説してた、平坦な道が無いから。

87 :名無しのひみつ:2010/03/22(月) 18:01:40 ID:QWe9VvwC
»86
そんなのただのこじつけで想像に過ぎない。
「車輪が磨耗するから」とかでも説明できるし、いくらでもこじつけできる。

所詮は創造論者と一緒で、何の根拠・証拠もなく、なんでも適者生存という名のもとに「想像」で説明していることに気が付いていない。しかし、彼らはこれを「科学」と称する。

ハエを航空工学の観点から見れば「飛んでいることがありえない」となるらしい。ハエと飛行機の例をとってみても分かるように、人類が生み出した機械・作動原理を、必ずしも自然界の生物も同じ機構を採用するとは限らない。

自然界は人類の生み出す機械とは別に進化する事だってあるというわけだ。自然界に「車輪がない」ことを無理やり「平坦な道が無いから」とこじつけて説明しているアシモフは間違っていると思う。

92 :名無しのひみつ:2010/03/22(月) 20:47:08 ID:1nB1lRh2
»87
昆虫スケールでは空気の粘性が高いので、航空力学ではなく流体力学的視点から研究してるらしい。

細菌が動き回る際に使う「べん毛」のプロペラ部分 変形の原理解明 - (*゚∀゚)ゞカガクニュース隊 (via plasticdreams) (via hisaruki) (via k32ru) (via atorioum) (via vmconverter) (via jacony) (via etecoo) (via ontheroad) (via kml) (via hawelka)

2010-03-25

(via quote-over100notes-jp)

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304 notes

jtotheizzoe:

explore-blog:

How long different animals live, in a vintage infographic by ISOTYPE pioneer Otto Neurath.

Are humans the only ones on this list marching forward?

jtotheizzoe:

explore-blog:

How long different animals live, in a vintage infographic by ISOTYPE pioneer Otto Neurath.

Are humans the only ones on this list marching forward?

(Source: explore-blog)

516 notes

(via sketchlock)

36,722 notes

ikenbot:

Martian Mineral Veins
Credit: HiRISE
The bright linear features cutting the bedrock in the center region of this image look like mineral veins.
Mineral veins are sheetlike bodies of minerals formed by water that flows through fractures. The setting of this image is the central uplift of a large (approximately 50-kilometer diameter) impact crater, where deep, ancient bedrock was uplifted about 5 kilometers and fractured.
Heat from the impact melted ice in the Martian crust, creating a hydrothermal system. This could have been a habitable environment.
A small mineral vein was recently discovered by the Opportunity rover at Endeavour Crater.

ikenbot:

Martian Mineral Veins

Credit: HiRISE

The bright linear features cutting the bedrock in the center region of this image look like mineral veins.

Mineral veins are sheetlike bodies of minerals formed by water that flows through fractures. The setting of this image is the central uplift of a large (approximately 50-kilometer diameter) impact crater, where deep, ancient bedrock was uplifted about 5 kilometers and fractured.

Heat from the impact melted ice in the Martian crust, creating a hydrothermal system. This could have been a habitable environment.

A small mineral vein was recently discovered by the Opportunity rover at Endeavour Crater.

(Source: afro-dominicano)

95 notes

jtotheizzoe:

staceythinx:

AS&K does some phenomenal science and medical animation. I have no idea what these things are, but I sure want to know. And isn’t that what good illustration does?

These are absolutely stunning! Let’s see if I can decode some of the biology behind the illustrations for you.

Top: This one’s tough. I couldn’t find any specific details, but it looks like a representation of a dying cell to me. When cellular machinery detects a serious problem (infection, out of control growth signals, gene instability, etc.) the apoptosis machinery is activated. Apoptosis (you can either say “ay-pop-toe-sis” or “ay-puh-toe-sis”) comes from the Greek words for “falling away”, alluding to how leaves are programmed to die and fall off of trees every winter. The characteristic blebs of the dying cell can be seen, as the cell disintegrates. 

Middle left: Certain kinds of immune cells consume foreign invaders and debris for a living, like the body’s trash collectors. These phagocytes migrate out of the blood stream in response to a sign of infection. Signals from the infected tissue allow the blood vessels to dilate and tiny pores to form, allowing the flexible phagocytes to crawl away to do battle using their long finger-like projections.

Middle right: HIV virus particles are attacking a CD4+ T-cell, the type of immune cell that they infect and the loss of which results in AIDS. The virus has proteins on its surface (the green and red spikes) that help it latch on to specific receptors on the T-cell surface (the mushroom-like basket things).

Bottom: Our cells are covered in hundreds of different receptors, surface markers and scaffold molecules. This is what allows them to take on a specific structure, as well as communicate with each other. Embedded in the plasma membrane (the blue, water-loving heads and green, oily lipids that make up our cell package), these receptors and surface proteins are thought to be organized into lipid rafts in order to keep them nearby other receptors and proteins that they work and communicate with.

Beautiful stuff!

1,853 notes

marukido:

すげー! 煙に見えて、気化したロウそのものだったのか!

marukido:

すげー! 煙に見えて、気化したロウそのものだったのか!

(Source: ForGIFs.com, via fialux)

6,801 notes

tatsukii:

(via 我々の知っている宇宙の姿を見ることができる超美麗ムービー「The Known Universe」 - GIGAZINE)

5 notes

tatsukii:

mocrlbmut:

tataraseitetsu:

shinoddddd:

thinkupstudio:

pipco:

reretlet:

yellowblog:

sunagimomazui:

suzukichiyo:

pipco:

kml:

sumireiro:

usagiya:

isana:

vmconverter:

atorioum:

nemoi:

masproduction:

jacony:

APOD: 2009 December 20 - Tutulemma: Solar Eclipse Analemma





この画像は、「アナレンマ」と呼ばれるもので、同時刻の1年間の太陽の動きを示したもの。つまり、この写真は一年間、同じ時間に同じ画角で写真を撮り続けた画像を合成してやっと得られるもの。しかも、この写真はそのうちの一枚が皆既日食のど真ん中に来ている。これはすごい。

tatsukii:

mocrlbmut:

tataraseitetsu:

shinoddddd:

thinkupstudio:

pipco:

reretlet:

yellowblog:

sunagimomazui:

suzukichiyo:

pipco:

kml:

sumireiro:

usagiya:

isana:

vmconverter:

atorioum:

nemoi:

masproduction:

jacony:

APOD: 2009 December 20 - Tutulemma: Solar Eclipse Analemma

この画像は、「アナレンマ」と呼ばれるもので、同時刻の1年間の太陽の動きを示したもの。つまり、この写真は一年間、同じ時間に同じ画角で写真を撮り続けた画像を合成してやっと得られるもの。しかも、この写真はそのうちの一枚が皆既日食のど真ん中に来ている。これはすごい。

1,636 notes

tatsukii:

The Scale of the Universe 2
ものの大きさを比較。 10^-35~観測可能な宇宙全体の大きさまで。 スムーズすぎて、酔いそう。
マインクラフトのフィールドって、地球より広いの?

tatsukii:

The Scale of the Universe 2

ものの大きさを比較。
10^-35~観測可能な宇宙全体の大きさまで。
スムーズすぎて、酔いそう。

マインクラフトのフィールドって、地球より広いの?

74 notes