I ran across this site while looking for a specific science article -
ScienceDaily: Latest Science News

It's free and covers material form a very wide array of scientific publications.

Essentially, it gives an abstract of a given article in lay terms, but also gives a link to the complete article. Some of the latter have restricted access, but many seem to be open to all and free.

Yup, good science right there and as a kid of the 60's, that was COOL special effects..........especially the antibodies on the tight wetsuit. :rolleyes:


raquel welch fantastic voyage - Google Search

Our Sun in time lapse, 3 years filmed, into a short 3 minute video...


NASA | SDO: Three Years of Sun in Three Minutes - YouTube

Mars by 2030?

It's Time to Get Serious About Going to Mars, NASA Says

Re: the 'nanobots' thing - a book by K. Eric Drexler -"Engines of Creation - The Coming Era of Nanotechnology" is/was a very interesting read for those interested in the field. A hard copy might prove a little tough to find as it was written 1986. I should re-read my paperback copy to see if & how some of his thoughts, ideas, & predictions have relevance & are in use today 27 years later.

Cheers
JB

thin film fexible solar - Google Search
Stick it anywhere. Vehicle panels. Roofs. Poles. Yard.
(But not where the sun don't shine.)

i like the idea of this.



Injectable Oxygen Keeps People Alive Without Breathing - PSFK

There was a movie called The Abyss which featured a technique called liquid breathing.

Liquid breathing - Wikipedia, the free encyclopedia

Not quite as cool as injectable oxygen though.

A tremendous explosion has occurred in the nearby universe and major telescopes across Earth and space are investigating. Dubbed GRB 130427A, the gamma-ray burst was first detected by the Earth-orbiting Fermi and Swift satellites observing at high energies and quickly reported down to Earth.

APOD: 2013 May 8 - Earth's Major Telescopes Investigate GRB 130427A

Treating cancer with radioactive bacteria: Three wrongs make a right | The Economist

Your body's immune system eliminates foreign cells including viruses and bacteria.

Cancer cells have immune-suppressing features, which allows them to grow and metastasize despite your immune system.

So, scientists thought, maybe the immune system won't eliminate bacteria around cancer cells.

Suppose that bacteria also attacked the cancer cells?

BBC News - Monster radiation burst from Sun - Things could get kinda interesting with the solar max approaching.
Cheers
JB

fixed

7 man made substances that say **** physics - Imgur
Ferrofluids
Aerogel
Perfluorocarbons
Elastic Conductors
non-Newtonian liquid
Transparent Alumina
Carbon Nanotubes

Bose–Einstein condensate - though it may not necessarily fit the definition of 'man-made' substances - it sure is something different. Webby should be weighing in on this.
Cheers
JB

NASA’s Kepler Spacecraft in Jeopardy After Malfunction, Astronomers Say
NASA’s planet-hunting Kepler spacecraft has been crippled by the failure of one of the reaction wheels that keep it pointed, the space agency is announcing this afternoon, according to astronomers close to the situation.
If engineers cannot restore the wheel or find some other way to keep the spacecraft’s telescope pointed, it could spell a premature end to one of the most romantic and successful of NASA’s missions: the search for Earth-like planets in habitable orbits around other stars. Just last month, astronomers reported that Kepler had found two planets only slightly larger than Earth orbiting in the “Goldilocks” zone, where liquid water is possible, of a star 1,200 light-years from here. More planet candidates, even smaller and closer to being Earth-like, lurk in the pipeline, astronomers say, but they have not yet been confirmed.

here is a BIG one: Scientists used a cloning technique to reprogram an ordinary human skin cell to become an embryonic stem cell.

BBC News - Rover radiation data poses manned Mars mission dilemma

This seems to confirm radiation dosage problem for future space travelers that has been often discussed.
Cheers
JB

Dead squirrel found on Mars

Careful Webby - Fox may just run with that!

Bloody squirrels get in everywhere.

You know, a metallic strip in the road could do this... then the car could just have a pin that extends down into a slot in the road to self guide.

Top Ten Inventions.......in energy and mechanics
Top 10 inventions in energy and mechanics

Looks like manned missions to Mars may take some more research and development.


Space radiation results should spark manned Mars mission debate | Science | guardian.co.uk

I did not know this about stars. :)

Scientific Breakthrough Reveals Stars Consist Primarily Of Twinkles | The Onion - America's Finest News Source

Seawater is full of organics, which makes this even more unexpected.

They don't touch on that in the article, but it's the reason you want to use washed and graded sand/aggregate in your mix.

New battery technology developed here at work:

Oak Ridge National Laboratory - New all-solid sulfur-based battery outperforms lithium-ion technology

I have been saying this for years... but hey, don't let science fact get in the way of our science fiction fantasies of playing Frisbee on Mars. :rolleyes:

nice -- maybe we need a battery thread, Mike

So, does this mean we will finally see a damn cell phone battery that lasts all day?

The Optical Society - Scientists Mimic Fireflies to Make Brighter LEDs
A GaN LED, coated with a "factory-roof" pattern modeled off the fireflies’ scales. The bio-inspired LED coating increased light extraction by more than 50 percent.

Whoa... That's cool. I wonder if our engineers have seen that at my company. We are always trying to maintain brightness but decrease power consumption..

Shark-Inspired Boat Surface -- Materials Engineers Turn to Ferocious Fish for Nonstick Ship Coating
"Brennan designed the surfaces to prevent algae and barnacles from growing on boats. He says, "We started making surfaces that are mimicking the shark's skin."
"Scientists have found that the ridges created by shark scales can reduce drag in the water by as much as 8 percent."

The study of evolution has in large part evolved (devolved?) into statistical analysis of DNA.

While I have some confidence in the DNA data, I am less certain of the applied statistics. In almost every study I have seen, there is buried somewhere in the statistical analysis some "fudge factor". Among the most common is the asumption that DNA mutates at some given rate from time eternal. Thus the "mother of all humans lived XXX,XXX years ago" sort of finding. That fudge factor has been challenged and, IIRC, changed at least twice.

The article below is a bit different, but relies on statistics rather than hard data to argue for the date of a very important event.

Is this good science? Does no one go into the field anymore?


From sciencedaily.com

"Scientists Date Prehistoric Bacterial Invasion Still Present in Today's Plant and Animal Cells

June 19, 2013 — Long before Earth became lush, when life consisted of single-celled organisms afloat in a planet-wide sea, bacteria invaded the ancient ancestors of plants and animals and took up permanent residence. One bacterium eventually became the mitochondria that today power all plant and animal cells; another became the chloroplast that turns sunlight into energy in green plants.

39A new analysis by two University of California, Berkeley, graduate students more precisely pinpoints when these life-changing invasions occurred, placing the origin of photosynthesis in plants hundreds of millions of years earlier than once thought.

"When you are talking about these really ancient events, scientists have estimated numbers that are all over the board," said coauthor Patrick Shih. Estimates of the age of eukaryotes -- cells with a nucleus that evolved into all of today's plants and animals -- range from 800 million years ago to 3 billion years ago.

"We came up with a novel way of decreasing the uncertainty and increasing our confidence in dating these events," he said. The two researchers believe that their approach can help answer similar questions about the origins of ancient microscopic fossils.

Shih and colleague Nicholas Matzke, who will earn their Ph.Ds this summer in plant and microbial biology and integrative biology, respectively, employed fossil and genetic evidence to estimate the dates when bacteria set up shop as symbiotic organisms in the earliest one-celled eukaryotes. They concluded that a proteobacterium invaded eurkaryotes about 1.2 billion years ago, in line withearlier estimates.

They found that a cyanobacterium -- which had already developed photosynthesis -- invaded eukaryotes 900 million years ago, much later than some estimates, which are as high as 2 billion years ago.

Previous estimates used hard-to-identify microbial fossilsor ambiguous chemical markers in fossils to estimate the time when bacteria entered ancestral eurkaryotic cells, probably first as parasites and then as symbionts. Shih and Matzke realized that they could get better precision by studying today's mitochondria and chloroplasts, which from their free-living days still retain genes that are evolutionarily related to genes currently present in plant and animal DNA.

"These genes, such as ATP synthase -- a gene critical to the synthesis of the energy molecule ATP -- were present in our single-celled ancestors and present now, and are really, really conserved," Matzke said. "These go back to the last common ancestor of all living things, so it helps us constrain the tree of life."

Since mitochrondrial, chloroplast and nuclear genes do not evolve at exactly the same rate, the researchers used Bayesian statistics to estimate the rate variation as well as how long ago the bacteria joined forces with eukaryotes. They improved their precision by focusing on plant and animal fossils that have more certain dates and identities than microbial fossils.

The paper appeared online on June 17 in advance of publication in the journal Proceedings of the National Academy of Sciences. Matzke also is a member of UC Berkeley's Center for Theoretical Evolutionary Genomics. (Emphasis added)

Story Source:

The above story is reprinted from materials provided by University of California - Berkeley. The original article was written by Robert Sanders.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


--------------------------------------------------------------------------------

Journal Reference:

1.P. M. Shih, N. J. Matzke. Primary endosymbiosis events date to the later Proterozoic with cross-calibrated phylogenetic dating of duplicated ATPase proteins. Proceedings of the National Academy of Sciences, 2013; DOI: 10.1073/pnas.1305813110

Need to cite this story in your essay, paper, or report? Use one of the following formats:
APA

MLA University of California - Berkeley (2013, June 19). Scientists date prehistoric bacterial invasion still present in today's plant and animal cells. ScienceDaily. Retrieved June 28, 2013, from http://www.sciencedaily.com*

I check this one.

Science News

the asumption that DNA mutates at some given rate from time eternal is called the molecular clock hypothesis

Having a fancy name for a fudge factor doesn't make it good science. Or does it?

Thanks. I'll give it a look.

I did not know this - cool.:)


Scientists discover thriving colonies of microbes in ocean 'plastisphere'
Jun 27, 2013
Scientists discover thriving colonies of microbes in ocean 'plastisphere'
http://cdn.physorg.com/newman/gfx/ne...ientistsdi.jpg