1. abaldwin360:

Visualization of evolutionary time scale relative to one calendar year.
Full resolution here
Just to give an idea of how much time it took like to go from early self replicating life forms, to single cell organisms, to animals.

    abaldwin360:

    Visualization of evolutionary time scale relative to one calendar year.

    Full resolution here

    Just to give an idea of how much time it took like to go from early self replicating life forms, to single cell organisms, to animals.

     
  2. 19:33 14th Nov 2012

    Notes: 259

    Reblogged from nprfreshair

    nprfreshair:

    (Stills from video footage of reporter Susannah Cahalan in the hospital.)

    Susannah Cahalan on the possible connection between her rare autoimmune disorder and cases of “demonic possesion” throughout history:

    When you think about the symptoms — in my case alone, this grandiosity,…

     
  3. 19:29

    Notes: 36

    Reblogged from abaldwin360-deactivated20130708

    abaldwin360:

    The planet does not orbit a star and is the first of its kind to be found

    This closeup of an image captured by the SOFI instrument on ESO’s New Technology Telescope at the La Silla Observatory shows the free-floating planet CFBDSIR J214947.2-040308.9 in infrared light. This object, which…

     
  4. 20:59 12th Oct 2012

    Notes: 408

    Reblogged from kenobi-wan-obi

    ikenbot:

Super-Earth Planet Likely Made of Diamond
Move over, Hope Diamond. The most famous gems on Earth have new competition in the form of a planet made largely of diamond, astronomers say.
Illustration: the interior of 55 Cancri e — an extremely hot planet with a surface of mostly graphite surrounding a thick layer of diamond, below which is a layer of silicon-based minerals and a molten iron core at the center. Credit: Haven Giguere
The alien planet, a so-called “super-Earth,” is called 55 Cancri e and was discovered in 2004 around a nearby star in our Milky Way galaxy. After estimating the planet’s mass and radius, and studying its host star’s composition, scientists now say the rocky world is composed mainly of carbon (in the form of diamond and graphite), as well as iron, silicon carbide, and potentially silicates.
At least a third of the planet’s mass is likely pure diamond.
“This is our first glimpse of a rocky world with a fundamentally different chemistry from Earth,” lead researcher Nikku Madhusudhan of Yale University said in a statement. “The surface of this planet is likely covered in graphite and diamond rather than water and granite.”
55 Cancri e is the first likely “diamond planet” to be identified around a sun-like star, though such worlds have been theorized before. Planets like this are vastly different from our Earth, which has relatively little carbon.
“By contrast, Earth’s interior is rich in oxygen, but extremely poor in carbon — less than a part in thousand by mass,” said study co-author and Yale geophysicist Kanani Lee.
55 Cancri e is what’s known as a super-Earth, with a radius twice as wide as that of our own planet, and a mass eight times greater. It speeds around its host star, making a full orbit in just 18 hours (Earth takes 365 days). It is so close in to the star that its surface temperature reaches a scorching 3,900 degrees Fahrenheit (2,100 degrees Celsius), making it probably way too hot for life.
Full Article

If I discovered a planet like that I’d totally name it after the woman I planned to marry. Oh you want a diamond? Here’s my super diamond planet! YEAH SCIENCE

    ikenbot:

    Super-Earth Planet Likely Made of Diamond

    Move over, Hope Diamond. The most famous gems on Earth have new competition in the form of a planet made largely of diamond, astronomers say.

    Illustration: the interior of 55 Cancri e — an extremely hot planet with a surface of mostly graphite surrounding a thick layer of diamond, below which is a layer of silicon-based minerals and a molten iron core at the center. Credit: Haven Giguere

    The alien planet, a so-called “super-Earth,” is called 55 Cancri e and was discovered in 2004 around a nearby star in our Milky Way galaxy. After estimating the planet’s mass and radius, and studying its host star’s composition, scientists now say the rocky world is composed mainly of carbon (in the form of diamond and graphite), as well as iron, silicon carbide, and potentially silicates.

    At least a third of the planet’s mass is likely pure diamond.

    “This is our first glimpse of a rocky world with a fundamentally different chemistry from Earth,” lead researcher Nikku Madhusudhan of Yale University said in a statement. “The surface of this planet is likely covered in graphite and diamond rather than water and granite.”

    55 Cancri e is the first likely “diamond planet” to be identified around a sun-like star, though such worlds have been theorized before. Planets like this are vastly different from our Earth, which has relatively little carbon.

    “By contrast, Earth’s interior is rich in oxygen, but extremely poor in carbon — less than a part in thousand by mass,” said study co-author and Yale geophysicist Kanani Lee.

    55 Cancri e is what’s known as a super-Earth, with a radius twice as wide as that of our own planet, and a mass eight times greater. It speeds around its host star, making a full orbit in just 18 hours (Earth takes 365 days). It is so close in to the star that its surface temperature reaches a scorching 3,900 degrees Fahrenheit (2,100 degrees Celsius), making it probably way too hot for life.

    Full Article

    If I discovered a planet like that I’d totally name it after the woman I planned to marry. Oh you want a diamond? Here’s my super diamond planet! YEAH SCIENCE

     
  5. 20:57

    Notes: 867

    Reblogged from kenobi-wan-obi

    image: Download

    ikenbot:

Fact Check: What a 9,000-Year-Old Earth Really Looked Like
U.S. House Rep. Paul Broun, a Georgia Republican, doesn’t believe in evolution, the Big Bang theory, or the teachings of embryology. In fact, in a Sept. 27 talk at LibertyBaptist Church in Hartwell, Ga., the member of the House Committee on Science, Space and Technology, who is also a medical doctor, called those areas of science “lies straight from the pit of hell.”
Illustration: An artist’s conception of a rocky, Earth-like planet forming in a star system 424 light-years away. A belt of rocky material feeds the planet’s formation in this early stage. Credit: NASA/JPL-Caltech/ C. Lisse (Johns Hopkins University Applied Physics Laboratory) 
But Broun also advanced his own theory of life on Earth.
“You see, there are a lot of scientific data that I’ve found out as a scientist that actually show that this is really a young Earth,” he said. “I don’t believe that the Earth’s but about 9,000 years old. I believe it was created in six days as we know them. That’s what the Bible says.”
Broun’s creationist viewpoint stands in opposition to what scientific research reveals about the age of the planet. In fact, Earth formed 4.54 billion years ago — and humanity is rather lucky not to be seeing the planet on its 9,000th birthday. Earth was formed by the colliding and coming together of massive space objects called planetesimals, said Richard Carlson, a geochemist at the Carnegie Institution who has studied some of Earth’s oldest rocks. The force of the impacts would have melted rock, leaving Earth molten for hundreds of thousands of years, Carlson told LiveScience.
“Nine thousand years after the last giant impact — there likely were several big impacts during the growth of the planet — the surface of Earth, to a considerable depth, likely was molten rock,” he said.
Creationist beliefs
Broun is far from the only believer in a literal, or Biblical, creation. According to a Gallup poll conducted in June, 46 percent of Americans believe God created humans in their present form within the last 10,000 years, a creationist belief. Only 15 percent said they believed in evolution without God’s hand, while 32 percent said they believed in evolution guided by God.
That survey did not ask adults how old they believed Earth to be, but estimates based on literal interpretation of the Bible normally range from 6,000 to 8,000 years. (It’s not clear why Broun believes in a 9,000-year-old Earth.)
The most popular 6,000-year-old figure comes from James Ussher, a 16th-century Irish clergyman. Ussher, whose position as Archbishop of Armagh made him head of the church in Ireland, published two works in the 1650s using genealogies from the Bible to date the creation of the world to Oct. 23, 4004 B.C.
Other estimates differ based on the use of different Bible translations and whether biblical scholars take the Bible’s six-day creation period literally or assume the “days” to be longer periods of time.
What the science says
Scientists, on the other hand, have reached a surprisingly precise answer as to the age when Earth and the rest of the solar system began to solidify: between 4.567 and 4.568 billion years — the equivalent of knowing a person’s birthday within two days, Carlson said.
This age range is calculated using isotopes, or variants of chemical elements. For the purposes of dating the solar system, researchers use lead and uranium isotopes. They measure the ratios of different types of isotopes from Earth and from meteorites. Because these objects all formed from the same pool of cosmic dust and gas during the birth of the solar system, the measurements enable researchers to determine how long ago the objects separated from that common pool.
As it turns out, these numbers mesh quite nicely with the ages of the oldest rocks known on Earth, which would have formed after the planet stabilized and cooled. The best estimate for the age of the oldest rocks on Earth, found near Hudson Bay in Quebec, is 4.4 billion years, according to Carlson. (The date is somewhat controversial, with some scientists believing 3.8 billion years is a closer date for those rocks.) Meanwhile, the oldest mineral grains found on Earth, zircons from Western Australia, date back 4.36 billion years.
The cooling and solidifying of the planet likely happened quickly on a geologic time scale, on the order of hundreds of thousands to a million years, Carlson said. But Adam and Eve wouldn’t have found Earth hospitable for a very long time. Even at 2.5 billion years of age, the planet had a flip-flopping atmosphere that periodically looked like something you’d see on one of Saturn’s moons today.
The first evidence for life on Earth may be Australian stromatolites, fossilized bacterial mats that date back 3.5 billion years. More certain fossils peg life’s arrival to 2.7 billion years ago. Modern humans, by contrast, didn’t show up until 200,000 years ago.
Source

Fight ignorance with science not hate!

    ikenbot:

    Fact Check: What a 9,000-Year-Old Earth Really Looked Like

    U.S. House Rep. Paul Broun, a Georgia Republican, doesn’t believe in evolution, the Big Bang theory, or the teachings of embryology. In fact, in a Sept. 27 talk at LibertyBaptist Church in Hartwell, Ga., the member of the House Committee on Science, Space and Technology, who is also a medical doctor, called those areas of science “lies straight from the pit of hell.”

    Illustration: An artist’s conception of a rocky, Earth-like planet forming in a star system 424 light-years away. A belt of rocky material feeds the planet’s formation in this early stage. Credit: NASA/JPL-Caltech/ C. Lisse (Johns Hopkins University Applied Physics Laboratory)

    But Broun also advanced his own theory of life on Earth.

    “You see, there are a lot of scientific data that I’ve found out as a scientist that actually show that this is really a young Earth,” he said. “I don’t believe that the Earth’s but about 9,000 years old. I believe it was created in six days as we know them. That’s what the Bible says.”

    Broun’s creationist viewpoint stands in opposition to what scientific research reveals about the age of the planet. In fact, Earth formed 4.54 billion years ago — and humanity is rather lucky not to be seeing the planet on its 9,000th birthday. Earth was formed by the colliding and coming together of massive space objects called planetesimals, said Richard Carlson, a geochemist at the Carnegie Institution who has studied some of Earth’s oldest rocks. The force of the impacts would have melted rock, leaving Earth molten for hundreds of thousands of years, Carlson told LiveScience.

    “Nine thousand years after the last giant impact — there likely were several big impacts during the growth of the planet — the surface of Earth, to a considerable depth, likely was molten rock,” he said.

    Creationist beliefs

    Broun is far from the only believer in a literal, or Biblical, creation. According to a Gallup poll conducted in June, 46 percent of Americans believe God created humans in their present form within the last 10,000 years, a creationist belief. Only 15 percent said they believed in evolution without God’s hand, while 32 percent said they believed in evolution guided by God.

    That survey did not ask adults how old they believed Earth to be, but estimates based on literal interpretation of the Bible normally range from 6,000 to 8,000 years. (It’s not clear why Broun believes in a 9,000-year-old Earth.)

    The most popular 6,000-year-old figure comes from James Ussher, a 16th-century Irish clergyman. Ussher, whose position as Archbishop of Armagh made him head of the church in Ireland, published two works in the 1650s using genealogies from the Bible to date the creation of the world to Oct. 23, 4004 B.C.

    Other estimates differ based on the use of different Bible translations and whether biblical scholars take the Bible’s six-day creation period literally or assume the “days” to be longer periods of time.

    What the science says

    Scientists, on the other hand, have reached a surprisingly precise answer as to the age when Earth and the rest of the solar system began to solidify: between 4.567 and 4.568 billion years — the equivalent of knowing a person’s birthday within two days, Carlson said.

    This age range is calculated using isotopes, or variants of chemical elements. For the purposes of dating the solar system, researchers use lead and uranium isotopes. They measure the ratios of different types of isotopes from Earth and from meteorites. Because these objects all formed from the same pool of cosmic dust and gas during the birth of the solar system, the measurements enable researchers to determine how long ago the objects separated from that common pool.

    As it turns out, these numbers mesh quite nicely with the ages of the oldest rocks known on Earth, which would have formed after the planet stabilized and cooled. The best estimate for the age of the oldest rocks on Earth, found near Hudson Bay in Quebec, is 4.4 billion years, according to Carlson. (The date is somewhat controversial, with some scientists believing 3.8 billion years is a closer date for those rocks.) Meanwhile, the oldest mineral grains found on Earth, zircons from Western Australia, date back 4.36 billion years.

    The cooling and solidifying of the planet likely happened quickly on a geologic time scale, on the order of hundreds of thousands to a million years, Carlson said. But Adam and Eve wouldn’t have found Earth hospitable for a very long time. Even at 2.5 billion years of age, the planet had a flip-flopping atmosphere that periodically looked like something you’d see on one of Saturn’s moons today.

    The first evidence for life on Earth may be Australian stromatolites, fossilized bacterial mats that date back 3.5 billion years. More certain fossils peg life’s arrival to 2.7 billion years ago. Modern humans, by contrast, didn’t show up until 200,000 years ago.

    Source

    Fight ignorance with science not hate!

     
  6. 20:51

    Notes: 5848

    Reblogged from cross-connect

    unknowneditors:

    Zachary Copfer

    Copfer, who is a microbiologist, has created a technique that makes use of genetically modified E. coli bacteria to create photographs.

    Nerdiness at its finest

     
  7. 09:40 6th Aug 2012

    Notes: 275

    Reblogged from neurosciencestuff

    neurosciencestuff:

    Rat Brain Tissue Sections

    The rat brain has served as an excellent model for elucidating the complex anatomy and physiological mechanisms of the human brain. As a result, a significant amount of information on brain diseases, such as dementia and Parkinson’s disease, has been determined from investigations using rat brains.

     
  8. 09:39

    Notes: 44

    Reblogged from

    image: Download

    cometsmeteoroids:

Rube Goldberg Meets Mars
A “sky crane,” shown in this illustration, successfully lowered Mars Science Laboratory the final few feet to the Martian surface at approximately 12:31 a.m. CDT August 6. The rover quickly transmitted a few thumbnail images, with full images scheduled for later in the day. The crane winched MSL’s Curiosity rover down a cable to its safe touchdown.[NASA/JPL]

    cometsmeteoroids:

    Rube Goldberg Meets Mars

    A “sky crane,” shown in this illustration, successfully lowered Mars Science Laboratory the final few feet to the Martian surface at approximately 12:31 a.m. CDT August 6. The rover quickly transmitted a few thumbnail images, with full images scheduled for later in the day. The crane winched MSL’s Curiosity rover down a cable to its safe touchdown.[NASA/JPL]

     
  9. 14:05 22nd Jul 2012

    Notes: 317

    Reblogged from abitinsane

    abitinsane:

    prostheticknowledge:

    CentraSight 

    An elderly woman is the first to have a small telescopic pupil to aid her sight - via Denver Post:

    Doris Ekblad-Olson is not too old to feel childish wonder at the idea of fixing her ailing eyes by letting someone suture in a tiny telescope.

    But age does allow her to be blunt about her anxiety as the first Colorado patient to have the pea-size telescope placed in her right eyeball.

    “I would rather I was his 100th patient,” chuckles Ekblad-Olson, 82, as she discusses the surgery with ophthalmologist Dr. Starck Johnson.

    The former teacher was still game to be the Colorado guinea pig, though, and went under Johnson’s micro-knives at Sky Ridge Medical Center on Tuesday. Doctor and patient hope the successfully implanted telescope will bring vision back to eyes dimmed by a severe form of macular degeneration.

    “There hasn’t been a lot we can do for these patients,” Johnson said. “We’ve been waiting a long time for this to come to fruition.”

    More Here

    How amazing is this?

     
  10. 14:05

    Notes: 135

    Reblogged from abitinsane

    image: Download

    abitinsane:

Cerebral ventricles 
For all the premeds out there

    abitinsane:

    Cerebral ventricles 

    For all the premeds out there