Not a single one of the cells that compose you knows who you are, or cares.
Just a reminder that your whole is far greater than the sum of your parts.
At least we know and care who they are!
Not a single one of the cells that compose you knows who you are, or cares.
Top 5 misconceptions about evolution: A guide to demystify the foundation of modern biology.
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Here’s an updated version of the common misconceptions about evolution. I much prefer this one, on account of correctly spelling “descent” vs “decent” :)
Peripheral nerves of a mouse embryo
Unlike the brain and spinal cord that are housed in protective bone, peripheral nerves connect regions of the body to the central nervous system like telephone cables. Peripheral nerves relay movement information from the brain to the muscles, for example, or sensory information from the skin to the brain. Remarkably, and also different from the brain and spinal cord, peripheral nerves have a tremendous capacity to regenerate when injured. Severed peripheral nerves grow about 1 mm per day (about an inch per month) until the two severed ends reconnect and innervate a once paralyzed muscle.
Image by Zhong Hua, Johns Hopkins University School of Medicine.
MRI scan of a human subject from the cranium to the feet.
I can’t be the only one that sees prosciutto, right?
I looked at this and thought about how the fat is marbled through the muscle, like this is a leg roast I’m looking at buying. The stomach-to-thigh transition is the most interesting one as the image spirals and tapers to the knee.
3D printing with stem cells could lead to printable organs
A potentially breakthrough 3D-printing process using human stem cells could be the precursor to printing organs from a patient’s own cells.
Some day in the future, when you need a kidney transplant, you may get a 3D-printed organ created just for you. If scientists are able to achieve that milestone, they may look back fondly at a breakthrough printing process pioneered by researchers at Heriot-Watt University in Scotland in collaboration with Roslin Cellab, a stem cell technology company.
The printer creates 3D spheroids using delicate embryonic cell cultures floating in a “bio ink” medium. They end up looking like little bubbles. Each droplet can contain as few as five stem cells. Basically, this comes down to the printer “ink” being stem cells rather than plastic or another material.
Dr. Will Shu is part of the research team working on the project. “In the longer term, we envisage the technology being further developed to create viable 3D organs for medical implantation from a patient’s own cells, eliminating the need for organ donation, immune suppression, and the problem of transplant rejection,” Shu said in a release from Heriot-Watt.
Perhaps most importantly, the stem cells survived the printing process and remained viable. Shu says this is the first time human embryonic stem cells have been 3D printed. Printing out organs may be far down the line, but it’s just one potential application. The method could also be used to print out human tissue for drug testing.
The research results have just been published in Biofabrication under the title “Development of a valve-based cell printer for the formation of human embryonic stem cell spheroid aggregates.”
Hangover Mastery of the Day: Become a partying champion with this handy hangover how-to from AsapSCIENCE. There’s a lot of dubious drinking advice out there, so it’s good to have the straight-up, scientific dope all in one place.
This was a great addition to their mini-series on hydration and alcohol. watch all of them, it’s currently at three videos but I’m sure Mitch and Greg would love and be so encouraged by having a larger audience.
‘Brinicle’ Ice Finger of Death - BBC
As sea water freezes to form surface ice, the remaining brine sinks, being much denser and colder than the surrounding water. As it descends, the surrounding water freezes upon contact, creating a ‘brinicle’, a frozen sheath of ice that grows downward towards the sea floor. When it touches the sea floor, it kills anything it touches, encasing them in a tomb of ice.
If you ever visit Melanasia and Australia one cannot help but be amazed by the striking blond hair of some of its inhabitants, since these Pacific islands are populated by some of the darkest skinned people in the world. The Aboriginal people of Australia and the South Pacific islands, such as the Solomon Islands,Vanuatu, and Fiji at birth are born with blond hair. In maturity the hair usually turns a darker brown color, but sometimes remains blond. Now, a study of people from the Solomon Islands shows that they evolved the striking blonde trait independently of people in Europe. These Aborigines are the oldest continuous population outside of Africa. The modern Aborigines are the direct descendants of the first explorers to leave Africa and arrive in the South Pacific 50,000 to 70,000 years ago. Scientist believe this genetic mutation appeared in Europe only about 11,000 years ago during the last ice age. THE ORIGINAL BLONDS…….
I saw this with a comment trail of ignorance so i decided to reblog the OP because this is just cool. I knew of none of this, I wonder what evolutionary benefit there is for people in this part of the world to have such light hair when compared to most other people with skin that dark. This honestly is fascinating.
Toronto becomes first city to mandate green roofs
Toronto is the first city in North America with a bylaw that requires roofs to be green. And we’re not talking about paint. A green roof, also known as a living roof, uses various hardy plants to create a barrier between the sun’s rays and the tiles or shingles of the roof. The plants love the sun, and the building (and its inhabitants) enjoy more comfortable indoor temperatures as a result.
Toronto’s new legislation will require all residential, commercial and institutional buildings over 2,000 square meters to have between 20 and 60 percent living roofs. Although it’s been in place since early 2010, the bylaw will apply to new industrial development as of April 30, 2012. While this is the first city-wide mandate involving green roofs, Toronto’s decision follow’s in the footsteps of other cities, like Chicago and New York.
Under the direction of Mayor Richard Daley the city of Chicago put a 38,800 square foot green roof on a 12 story skyscraper in 2000. Twelve years later, that building now saves $5000 annually on utility bills, and Chicago boasts 7 million square feet of green roof space. New York has followed suit, and since planting a green roof on the Con Edison Learning Centre in Queens, the buildings managers have seen a 34 percent reduction of heat loss in winter, and reduced summer heat gain by 84 percent.
But lower utility bills aren’t the only benefit of planting a living roof. In addition to cooling down the city, green roofs create cleaner air, cleaner water, and provide a peaceful oasis for people, birds and insects in an otherwise polluted, concrete and asphalt-covered environment.
Ovaries do not have as much to do with the female ejaculatory process as tumblr would have you believe. Seriously, if your ovaries are exploding, go the fucking hospital, get off tumblr and go to the hospital that shit should not be happening.
The moisture from sexual arousal comes from the Bartholin’s glands just inside the opening of the vagina. Ejaculation comes from the Skene’s gland and the urethra. The ovaries are where the eggs hang out, if anything is going to explode from rapid arousal at least use a gland, sing the praises of your prostate (the skene’s is like a female prostate kind of in conjunction with the G-spot).
But seriously, ovaries should not explode. If men started posted about their balls exploding I’d be equally worried (but I have heard that limp ejaculations can happen but that’s different, it’s not a fucking explosion).
If ovaries are going to respond to the sexual act it’s when the body recognizes there is semen in the vaginal canal and/or the cervix and it’s close enough to menstruation that it’s pretty much like ‘let’s hop on this pregnancy’ but that’s after things are done.
Come the fuck on, it’s really not cute and the phrase is kind of annoying to see, I generally don’t edit reblogs but when I’m checking my tracked tags and i see anything about ovaries responding to much other than that fucking hormonal shift that makes life hell then I’m like ‘really, what the flipping fuck is wrong with you!?’. I kind of want to punch whoever started that shit.
30,000 year old flower revived.
Scientists have resurrected a flower from plant tissues found frozen in Siberian permafrost, thought to be 30,000-32,000 years old. The new Silene stenophylla is healthy and fertile, and producing viable seeds.
The experiment has excited many because it proves that material trapped in the permafrost is recoverable and usable - scientists have been working to recover other species of plant and animal life from the same area, such as the woolly mammoth.
Source: USA Today
Flatfish found in aquarium after lying undiscovered for 15 years
The bottom-dwelling sand sole - dubbed Nemo - was only discovered when its 40,000-litre open native rockpool tank was routinely cleaned at the Blue Planet Aquarium in Cheshire.
But despite being quite a large fish, staff think the fish may have been a stowaway when the tank was delivered in 1996 as they had no records of the flatfish having arrived at the aquarium .
Acting curator Colin Grist said: ‘We’ve called him Nemo, because we’ve found him, just like in the film - except we didn’t know we were looking.
‘Although we haven’t been aware of its existence it seems to have been doing extremely well.
‘It’s in perfect condition and has obviously been feeding well and probably waiting until the lights go out to go hunting.
He added: ‘It’s extraordinary that it’s managed to have remained hidden for so long but it does go to show just how well evolved it is to its natural environment.’
oh my god