Gravity Lights: No batteries

Although many of us take for granted the fact that we can simply hit a switch and be flooded with artificial light, around one billion people in the world still live without electricity.

This means a lot of people are relying on dangerous and expensive kerosene lamps to provide them with light to study, work and cook after dark.

This kinetic energy then powers a drive sprocket and polymer gear train that lights up the LED as it goes.

Once the weight gets to the floor, the light goes out and you need to repeat the process, but each pull provides you around 20 to 30 minutes of light, depending on how high you lift the weight up in the first place.

The team is now crowd-funding the second version of GravityLight on Indiegogo, with the hope that they can raise US$199,000 in order to make their light brighter, longer-lasting and easier to use.

GravityLight will be initially targeted to families in developing countries, with an initial focus on Kenya, and the team is hoping to provide local jobs by creating and selling the lights over there.

Of course, the best thing about gravity is that it's free, so once the initial investment has been made, the lights literally cost nothing to run.

source: go here

A Millipede that Glows

 Not seen for nearly 50 years, the small, blind millipede Xystocheir bistipita, was recently rediscovered in the foothills of San Luis Obispo, California by entomologist Dr Paul Merek of the Virginia Polytechnic Institute.

Analysis of Xystocheir bistipita's DNA revealed that the millipede actually belonged to a different genus, Motyxia - the only genus of bioluminescent millipede in the western hemisphere.

The identity-challenged millipede was then renamed Motyxia bistipita.

The researchers ranked the light intensity and toxicity of all the millipedes in its newly acquired family and found that M. bistipita is pretty dull and less toxic compared to its mountain-dwelling cousins, which are larger and much more luminous.

The brighter the millipedes were, the more cyanide they contained, which suggests the millipedes at higher elevations use bioluminescence as a forewarning to predators.

M. bistipita has very few predators - so why does it still glow in the dark? Unlike fireflies that glow because of an enzymatic reaction that converts a pigment called luciferin into a new compound that emits light, bioluminescence in millipedes is caused by the reaction of a photoprotein that uses magnesium and molecules that contain oxygen.

"After we sequenced them we were able to place the millipede on an evolutionary tree with other bioluminescent species of Motyxia," says Marek.

source: go here

Newest Member of the Homo Family: Australopithecus deyiremeda

They combine both Human and apelike features...

This no doubt in the world of evolution suggests that they were an early ancestor of Homo sapiens ie the human generation which has existed for only but 200, 000 years approximately.

Researchers have confirmed that a new hominin ancestor lived in Ethiopia between 3.3 and 3.5 million years ago, at the same time as the 'Lucy' species, Australopithecus afarensis.

"The new species is yet another confirmation that Lucy's species, Australopithecus afarensis, was not the only potential human ancestor species that roamed in what is now the Afar region of Ethiopia during the middle Pliocene," lead author, Yohannes Haile-Selassie, from the Cleveland Museum of Natural History in the US, said in a press release.

"Current fossil evidence from the Woranso-Mille study area clearly shows that there were at least two, if not three, early human species living at the same time and in close geographic proximity." The new species was identified from a series of teeth and jaw bones that were discovered in 2011 in the central Afar region of Ethiopia, just 35 kilometres from the remains of 'Lucy', one of the most complete hominin skeletons ever discovered.

The lower jaws were also far more robust then jawline of A. afarensis, leading the researchers to classify the remains as a new species, which they've called Australopithecus deyiremada - deyiremada is taken from words that mean "Close relative" in the language of the Afar people.

The team then looked at the sediment on the remains, and used radiometric dating and palaeomagnetic data to work out when the new species lived.

150527134040 1 900x600Yohannes Haile-Selassie/Cleveland Museum of Natural History "This new species from Ethiopia takes the ongoing debate on early hominin diversity to another level," said Haile-Selassie.

"Some of our colleagues are going to be skeptical about this new species, which is not unusual. However, I think it is time that we look into the earlier phases of our evolution with an open mind and carefully examine the currently available fossil evidence rather than immediately dismissing the fossils that do not fit our long-held hypotheses." The challenge now is convincing the skeptics that A. deyiremada is indeed a separate species to Lucy - something that's pretty difficult given that we don't know much about how our ancestors looked or behaved.

sources: source 1, source 2

A Fish that Flies (Mobula Ray's)

Mobula is a genus of ray in the family Myliobatidae. Their appearance is similar to that of manta rays, which are in the same family. 

 source: Wikipedia

These marine animals, which are often referred to as devil rays because their heads have two horn-like points, can soar through the air for up to a few seconds at a time before belly-flopping back to their watery home.

Scientists propose that it could be a mating ritual, a way to feed, or just a fun activity, but no one is certain, yet.

Octavio Aburto, an assistant professor at the Scripps Institution of Oceanography, came upon a giant swarm of thousands of these flying devil fish near the Gulf of California in 2011.

Most of the mind-blowing photos you'll see here were taken during that encounter by Aburto with the International League of Conservation Photographers.

Source: go here

Sitting Does Damage Your Body

Watch Video Here 
If you're anything like us, you've spent at least 80 percent of your day sitting down so far.

Sitting on a bus on the way to work, sitting at your desk, sitting at lunch... well, you get the idea.

Unless you've been living without the Internet for the past five years, you'll be well aware by now how bad that it is for you.

Created by animator Duncan Elms for Australian news program 60 Minutes, this is one of the best summaries of the research we've seen so far, and also helps to explain why something so seemingly innocent can potentially trigger such broad problems, such as cardiovascular disease and diabetes.

Along with the usual suspects of weight gain and back pain, the animation explains how, as soon as you sit down, the enzymes that break down fat drop by 90 percent, and your insulin effectiveness and good cholesterol levels drops.

Sitting also makes blood clots more likely to form in your brain, and people with desk jobs are twice as likely to suffer from heart disease than those with active jobs.

Source

The waters of Lake Michigan are so crystal clear that you can see all of its secrets laid bare from the sky.

Despite how inviting the perfect blue water looks, don't be deceived, it's still only around 3 degrees Celsius.

One of the coast guard pilots, Charlie Wilson, told NPR that it's "Fairly common" to see a wreck from the sky, but "Not in the numbers we saw on that flight".

They've since shared their images on the US Coast Guard Air Station Traverse City Facebook page, calling the event "Shipwreck Sunday".

Some of the wrecks they spotted were well known, including the remains of the James McBride, photographed below, which sank in shallow water during a storm on 19 October 1857.

Lake-michigan-shipwrecks vert-172f028979b49270e3d2c5332e26dde2bcbd307d-s700-c85US Coast Guard Air Station Traverse City 11159957 451769294989741 2938430622155184893 nUS Coast Guard Air Station Traverse City Also in shallow water was the well known wreck of the Rising Sun, photographed in the top image, which went down in 1917 - thankfully all 32 people on board at the time were rescued.

These wrecks were all photographed near Sleeping Bear Point northeast along the shoreline to Leland, the US Coast Guard reports.

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