Archaelogists have claimed that scrawl on the back of a letter recovered from a 17th century dig site reveals a previously unknown language spoken by indigenous peoples in northern Peru.

A team of international archaeologists found the letter under a pile of adobe bricks in a collapsed church complex near Trujillo, 347 miles north of Lima. The complex had been inhabited by Dominican friars for two centuries.

"Our investigations determined that this piece of paper records a number system in a language that has been lost for hundreds of years," Jeffrey Quilter, an archaeologist at Harvard's Peabody Museum of Archaeology and Ethnology, said.

A photograph of the letter recently released by archaeologists shows a column of numbers written in Spanish and translated into a language that scholars say is now extinct.

"We discovered a language no one has seen or heard since the 16th or 17th century," Mr Quilter said, adding that the language appears to have been influenced by Quechua, an ancient tongue still spoken by millions of people across the Andes.

Pasty kids with greasy hair typing on command lines. Dark villains of the networked world. Security magicians with odd political beliefs. We have a lot of ideas about who hackers are, but very few people have actually tried to seriously investigate the anthropology of one of the more fascinating social groups to emerge at the end of the 20th century. NYU's Gabriella Coleman studies their culture, an odd brew of faith in freedom of information and traditional liberalism, along with a generous salt-and-peppering of nerdiness and counterculturalism. In the latest edition of our syllabus-as-essay series, Coleman guides us past the stereotypes and into the many hideouts and projects of the hacker underground.

Scientists said Wednesday they've discovered fossils in the southern Utah desert of two new dinosaur species closely related to the Triceratops, including one with 15 horns on its large head.

The discovery of the new plant-eating species - including Kosmoceratops richardsoni, considered the most ornate-headed dinosaur known to man - was reported Wednesday in the online scientific journal PLoS ONE, produced by the Public Library of Science.

The other dinosaur, which has five horns and is the larger of the two, was dubbed Utahceratops gettyi.

"It's not every day that you find two rhino-sized dinosaurs that are different from all the other dinosaurs found in North America," said Mark Loewen, a Utah Museum of Natural History paleontologist and an author of the paper published in PLoS ONE.

Louise Patten, whose grandfather was the only surviving officer on the Titanic, reveals the truth about how it sank.

All families have their secrets, but usually about things that don't matter to anybody else. Not in the case of Louise Patten, though - or The Lady Patten to give her her full title, the wife of former Tory Education minister, Lord (John) Patten, though her own career as one of the first women board directors of a FTSE 100 company, and as a successful author of financial thrillers, means that she has plenty of achievements in her own right.

As a teenager in the 1960s, Patten was let in on a secret by her beloved grandmother, which, if revealed, she was warned, would result in two things. The first was awful - it would destroy the good name of her dead grandfather, Charles Lightoller, awarded the DSC with Bar in the First World War, and a hero again for his part in the evacuation of Dunkirk in 1940. But the second would change history, overturning the authorized version of one of the world's greatest disasters, the sinking of the Titanic with the loss of 1517 lives in April 1912.

The tension between these two outcomes goes some way to explaining why, for 40 years, Patten kept quiet, not even, she reveals with a girlish chuckle from underneath the fringe of her striking black bob, telling her husband what she knew. What did he say when she finally did? 'I think it was "Good God".' Now, though, 56-year-old Patten has finally decided to come clean with the rest of the world in her latest novel, Good as Gold.

But can there really be anything new to say, almost 100 years on, about the Titanic? 'My grandfather was the Second Officer on the Titanic,' Patten explains. 'He was in his cabin when it struck the iceberg. Afterwards, he refused a direct order to go in a lifeboat, but by a fluke he was saved.'

For the first time in almost 20 years, northern autumn is beginning on the night of a full Moon. The coincidence sets the stage for a "Super Harvest Moon" and a must-see sky show to mark the change of seasons.

The action begins at sunset on Sept 22nd, the last day of northern summer. As the sun sinks in the west, bringing the season to a close, the full Harvest Moon will rise in the east, heralding the start of fall. The two sources of light will mix together to create a kind of 360-degree, summer-autumn twilight glow that is only seen on rare occasions.

Keep an eye on the Moon as it creeps above the eastern skyline. The golden orb may appear strangely inflated. This is the Moon illusion at work. For reasons not fully understood by astronomers or psychologists, a low-hanging Moon appears much wider than it really is. A Harvest Moon inflated by the moon illusion is simply gorgeous.

The view improves as the night wears on.

This morning between 0230 UT and 0600 UT, the northern hemisphere of the sun erupted in a tumult of activity. At least two dark magnetic filaments became unstable and lifted off the stellar surface, a B8-class solar flare flashed from sunspot 1109, and a bright coronal mass ejection billowed into space. Play a time-lapse movie from Solar Dynamics Observatory--and pay attention to the circled regions:

The eruption is reminiscent of the global event of August 1st, which hurled a CME toward Earth and sparked Northern Lights in the United States as far south as Iowa. This time, however, the CME will miss Earth (unless it veers off course) so there should no resulting geomagnetic activity.

Scientists from the California Institute of Technology and UCLA have discovered evidence of "universal ubiquitous magnetic fields" that have permeated deep space between galaxies since the time of the Big Bang.

Caltech physicist Shin'ichiro Ando and Alexander Kusenko, a professor of physics and astronomy at UCLA, report the discovery in a paper to be published in an upcoming issue of Astrophysical Journal Letters; the research is currently available online.

Ando and Kusenko studied images of the most powerful objects in the universe -- supermassive black holes that emit high-energy radiation as they devour stars in distant galaxies - obtained by NASA's Fermi Gamma-ray Space Telescope.

"We found the signs of primordial magnetic fields in deep space between galaxies," Ando said. Physicists have hypothesized for many years that a universal magnetic field should permeate deep space between galaxies, but there was no way to observe it or measure it until now.

Sunspot formation is triggered by a magnetic field, which scientists say is steadily declining. They predict that by 2016 there may be no remaining sunspots, and the sun may stay spotless for several decades. The last time the sunspots disappeared altogether was in the 17th and 18th century, and coincided with a lengthy cool period on the planet known as the Little Ice Age.

Sunspots are regions of electrically charged, superheated gas (plasma) on the surface of the sun, formed when upwellings of the magnetic field trap the ionized plasma. The magnetic field prevents the gas from releasing the heat and sinking back below the sun's surface. These areas are somewhat cooler than the surrounding sun surface and so appear to us as dark spots.

Sunspots have been observed at least since the early 17th century, and they are known to follow an 11 year cycle from solar maximum to solar minimum. The solar minimum usually lasts around 16 months, but the current minimum has already lasted 26 months, which is the longest minimum in a hundred years.

Titan's northern hemisphere is set for mainly fine spring weather, with polar skies clearing since the equinox in August last year. Cassini's VIMS instrument has been monitoring clouds on Titan continuously since the spacecraft went into orbit around Saturn. Now, a team led by Sébastien Rodriguez (AIM laboratory - Universite Paris Diderot) has used more than 2000 VIMS images to create the first long-term study of Titan's weather that includes the equinox, using observational data. Dr. Rodriguez will be presenting the results at the European Planetary Science Congress in Rome on Wednesday 22nd September.

Together with Saturn in its 30-years orbit around the Sun, Titan has seasons that last for 7 terrestrial years. The team has observed significant atmospheric changes between July 2004 (early summer in the southern hemisphere) and April 2010, the very start of northern spring. The images showed that cloud activity has recently decreased near both of Titan's poles. These regions had been heavily overcast during the late southern summer until 2008, a few months before the equinox.

"Over the past six years, we've found that clouds appear clustered in three distinct latitude regions of Titan: large clouds at the north pole, patchy cloud at the south pole and a narrow belt around 40 degrees south. However, we are now seeing evidence of a seasonal circulation turnover on Titan - the clouds at the south pole completely disappeared just before the equinox and the clouds in the north are thinning out. This agrees with predictions from models and we are expecting to see cloud activity reverse from one hemisphere to another in the coming decade as southern winter approaches," said Dr. Rodriguez.

Scientists from Boston University's Center for Space Physics reported today that NASA satellites designed to view the escaping atmosphere of the Sun have also recorded evidence of escaping gas from the planet Mercury. The STEREO mission has two satellites placed in the same orbit around the Sun that the Earth has, but at locations ahead and behind it. This configuration offers multi-directional views of the electrons and ions that make up the escaping solar wind. On occasion, the planet Mercury appears in the field of view of one or both satellites.

In addition to its appearance as a bright disk of reflected sunlight, a "tail" of emission can be seen in some of the images. Announcing this new method of observing Mercury and trying to understand the nature of the gases that might make up this tail feature were the topics presented at the European Planetary Science Congress meeting in Rome today.

It has been known that Mercury exhibits comet-like features, with a coma of tenuous gas surrounding the planet and a very long tail extending in the anti-sunward direction. From Earth, observations of both of these features can be done using light from sodium gas sputtered off the surface of Mercury. The Sun's radiation pressure then pushes many of the sodium atoms in the anti-solar direction creating a tail that extends many hundreds of times the physical size of Mercury.