Science is the poetry of Nature.







Contributing Authors

fuckyeahfluiddynamics:

Yesterday we discussed some of the basic mechanics of a frisbee in flight. Although frisbees do generate lift similarly to a wing, they do have some unique features. You’ve probably noticed, for example, that the top surface of a frisbee has several raised concentric rings. These are not simply decoration! Instead the rings disrupt airflow at the surface of the frisbee. This actually creates a narrow region of separated flow, visible in region B on the left oil-flow image. Airflow reattaches to the frisbee in the image after the second black arc, and the boundary layer along region C remains turbulent and attached for the remaining length of the frisbee. Keeping the boundary layer attached over the top surface ensures low pressure so that the disk has plenty of lift and remains aerodynamically stable in flight. A smooth frisbee would be much harder to throw accurately because its flight would be very sensitive to angle of attack and likely to stall. (Image credits: J. Potts and W. Crowther; recommended papers by: V. Morrison and R. Lorentz)

Traces of One of Universe’s First Stars Detected

An ancient star in the halo surrounding the Milky Way galaxy appears to contain traces of material released by the death of one of the universe’s first stars, a new study reports.

The chemical signature of the ancient star suggests that it incorporated material blasted into space by a supernova explosion that marked the death of a huge star in the early universe — one that may have been 200 times more massive than the sun.

"The impact of very-massive stars and their explosions on subsequent star formation and galaxy formation should be significant," lead author Wako Aoki, of the National Astronomical Observatory of Japan, told Space.com by email.

(via afro-dominicano)

afro-dominicano:

Partial Eclipse at Moonrise by David Malin

A partial lunar eclipse at Moonrise is photographed in a multi-exposure image from Port Hedland, Western Australia.

afro-dominicano:

Cygnus X-1

This image only shows part of the black hole jet powered bowshock nebula associated with Cygnus X-1.

Copyright: T.A. Rector (University of Alaska Anchorage) and H. Schweiker (WIYN and NOAO/AURA/NSF)

cenwatchglass:

Rocket engine. Bruce Schmitz examines a rocket engine being developed for NASA by Rocket Research Corp. It will be designed to deliver highly reproducible thrusts for making small corrections in the speed and direction of spacecraft. The propellant will be pure hydrazine or mixtures of hydrazine, nitric acid, and water, so the propellant’s freezing point can be reduced to -20° F.

Chemical & Engineering News, January 17, 1966

laboratoryequipment:

Citizen Scientists Save Lives

Citizen scientists are saving the lives of people living in the shadow of deadly volcanoes according to new research from the Univ. of East Anglia.

A report, published today in the Journal of Applied Volcanology, reveals the success of a volunteer group set up to safeguard communities around the “Throat of Fire” Tungurahua volcano in the Ecuadorian Andes. More than 600 million people live close to active volcanoes worldwide. The research shows that living safely in these dangerous areas can depend on effective communication and collaboration between volcanologists, risk managers and vulnerable communities.

Read more: http://www.laboratoryequipment.com/news/2014/08/citizen-scientists-save-lives

post-mitotic:

microscopic bone marrow transplant — hematopoietic stem cells (the immortal source of both red and white blood cells) poised in a syringe for transplant

colored SEM composite image

credit: Steve Gschmeissner

Spray-On Solar May Be Cheaper And More Eco-Friendly Than The Panels On Your Roof
ADELE PETERS, fastcoexist.com

Spray-on solar cells take less energy to make and can be put on everything from jeans to cars.

Scientists are one step closer to spray-on solar power. Instead of traditional bulky solar cells encased in glass—which can be awkward to put in places other than a roof, and take a lot of energy to produce—we may someday be able to easily spray paint low-cost, low-energy solar cells on everything from a pair of jeans, to a car, to the side of a skyscraper.

(via emergentfutures)

studentparamedics:

An alveolus (plural: alveoli, from Latin alveolus, “little cavity”) is an anatomical structure that has the form of a hollow cavity. Found in the lung parenchyma, the pulmonary alveoli are the terminal ends of the respiratory tree, which outcrop from either alveolar sacs or alveolar ducts, which are both sites of gas exchange (Oxygen and Carbon Dioxide) with the blood as well.

Image by David Gregory and Debbie Marshall

Taken from Daily Anatomy

(via nursingisinmyblood)

stereoculturesociety:

CultureHISTORY: #Ferguson Protests 2014 

  1. Tuskegee University Students, August 2014 
  2. African American Harvard Law Students, August 2014

 #MikeBrown #DontShoot 

(via lareinaana)

We criticize dictators for quelling dissent and silencing protestors with tactics like curfews, we’ll certainly speak out when it’s happening in our own backyard," he said. "The people of Ferguson have the right to protest peacefully the lack of accountability for Michael Brown’s shooting.
Amnesty International sending team to Ferguson. First time it’s deployed inside the US. (via soulsinsolidarity)

(via fallenangellostfeathers)

msnbc:

"From 2006 to 2012, a white police officer killed a black person at least twice a week in this country." - MHP

Melissa Harris-Perry gives a heart-wrenching tribute to the deaths of black men that have occurred at the hands of police in the past decade.

I just want to note that Melissa shows only men in her slide reel, but was accurate in saying a Black person was killed nearly every week. In that same time frame, girls as young as 7 years old, and women as old as 92 years old, have been shot to death by police and vigilantes and received little to no justice.

In 2012, it was estimated that a Black person was extrajudicially murdered by police and vigilantes in the United States every 28 hours, and that these numbers may be under reported. It is rare to see a conviction that sticks, and many of these murderers go free or back to their “jobs” to continue terrorizing innocent citizens.

(via thebluelip-blondie)

libutron:

Freshwater ciliate Colpidium campylum (400x) 

These are freshwater ciliates of the species Colpidium campylum, characterized by its kidney-shaped cell. The cilia of this protozoan are arranged in rows, and inside you can see the two nuclei that are characteristic of many other ciliates, a more or less central macronucleus, and one micronucleus, slightly smaller.

Because it feeds on bacteria, Colpidium campylum is a microorganism involved in the process of self-purification of water. When the concentration of bacteria is very high in the water, and consequently food is abundant, the population of this protozoan multiplies. So, this species is regarded as a test-microorganism and is used in bioassays with a broad range of applications for single toxicants and contaminant mixtures, such as effluents.

[Protozoa - Ciliophora - Hymenostomatida - Tetrahymenidae - ColpidiumColpidium campylum Stokes]

Technique: Interference Contrast.

References: [1] - [2] - [3]

Photo credit: ©Proyecto Agua | Locality: from a water sample collected in the Ebro river as it passes through Logroño river, La Rioja, Spain (2008)