Scientists Develop Tractor Beam (On A Microscopic Scale)

by Sean McLachlan on

A research team in Scotland and the Czech Republic has developed a tractor beam.

A press release from St. Andrews University reveals that scientists at that university and at the Institute of Scientific Instruments in the Czech Republic have for the first time been able to use light to draw objects closer, although only on a microscopic scale.

It has long been known that photons create a small amount of pressure. Johanes Kepler described the effect way back in the 17th century when he observed that the tails of comets point away from the sun. Experiments using light to push microscopic objects have been conducted for decades, but the current research is the first time light has been used to attract objects.

The team discovered that under a certain set of parameters with a special optical field, the pushing effect turns into a negative force and the object is drawn closer.

The negative force is specific to the object’s size and composition, allowing scientists to pick and choose what objects to attract. This would have applications to medicine and biological research, enabling researchers to sort cells or even parts of a cell. The team’s results have been published in Nature Photonics.

A real science-fiction-style tractor beam would have to be on a vastly greater scale than these experiments, however, so don’t expect it to be used for transportation anytime soon. We’ll see space tourism long before that. The tractor beam experiments are a bit like teleportation experiments that made headlines a year ago. We’re seeing what our grandkids might one day take for granted.

[Image courtesy St Andrews University]

Smithsonian Unveils Evotourism (TM) Website For People Interested In Our Evolutionary Past

by Sean McLachlan on


Ever heard of Evotourism™? No? That’s because the Smithsonian Institution just made it up.

This month’s issue of Smithsonian magazine is all about Evotourism™, which they’ve decided to trademark so we all have to put that pesky trademark symbol after it. Not a user-friendly way to coin a new term.

As their new dedicated site says, Evotourism™ is the “Smithsonian’s new travel-information service that will help you find and fully enjoy the wonders of evolution. Whether it’s a city museum or suburban fossil trove, a historic scientific site overseas or a rare creature in your own backyard, we’ll direct you to places and discoveries that figure in the science of evolution or offer eye-opening evidence of the process of natural selection.”

The site lists a variety of places to learn about the evolution of life on our planet, from Dinosaur National Monument in Utah, where you and your family can pose for photos in front of a dinosaur still encased in rock, to Darwin’s home just outside London. Each destination is given a detailed treatment with an accompanying article.

There are also some general articles on subjects such as the life and work of Charles Darwin. One important piece is an interview with Christián Samper, former director of Smithsonian’s National Museum of Natural History that clears up many of the misconceptions about evolution, such as the common misperception that belief in evolution and belief in God is an either/or proposition.

The site is organized by theme, so if you have kids in tow or are a photographer, you’ll be directed to the sites that are best for you.

It’s a good list to start with, but of course there are many more sites to visit and the folks at the Smithsonian will be adding to it. They were modest enough not to include their own Natural History Museum in Washington, DC, surely one of the best Evotourism™ destinations anywhere. I’d also suggest the Science Museum in London, the Natural History Museum in New York City, and the Natural History Museum in Oxford, England.

For adventure travelers who want to get to the source, there’s the National Museum in Addis Ababa, Ethiopia, which has Lucy, the famous 3.2 million-year-old Australopithecus afarensis, and a display of skulls from the earliest human ancestors to modern humans in chronological order to show how primate-like traits gradually gave way to a more human appearance. Other rooms show the evolution of other animals.

What other Evotourism™ destinations would you recommend? Tell us in the comments section!

[Photo courtesy Flickr user InSapphoWeTrust]

Royal Institution In London Looking To Sell Its Historic Home

by Sean McLachlan on


The Royal Institution of Great Britain, one of London’s great scientific landmarks, may soon be moving.

The BBC reports that it’s putting its historic Mayfair property on the market with an asking price of £60 million ($96 million). The Royal Institution was founded in 1799 to promote scientific study and education. It hosts numerous lectures, a video channel, and there’s a museum dedicated to Faraday on site.

Michael Faraday’s 19th century experiments, many of which took place in the institution’s building, led to the practical use of electricity.

The institution has been in financial difficulty for several years and hoped to turn itself around with a major remodel. Unfortunately, the cost of doing that was not matched by new income and donations.

One scientist I spoke to who has lectured at the Royal Institution says that this announcement may be a cry for help to get more donations. I hope she’s correct. I wouldn’t want to lose such an important landmark in the middle of my favorite city.

[Photo courtesy Mike Peel]

Naughty Roman Frescoes Uncovered In Colosseum

by Sean McLachlan on


Archaeologists working on a conservation project at the Colosseum in Rome have discovered ancient frescoes of gladiators and erotic scenes, Agence France Press reports.

The brightly colored fragments were found on the walls of a corridor currently closed to the public for restoration. The scenes show gladiators being honored with laurels. There are also erotic scenes, although the researchers didn’t go into detail about what they showed.

The popularity of erotic art in the Roman Empire has led to the perception that it was a permissive society. Actually that was only half true. Many Romans were straight-laced and sexually conservative. A good parallel is the modern United States, where a large number of people frown on public displays of nudity or sexuality, while on the other hand Americans produce and consume vast amounts of pornography. Often these are the same Americans. A 2009 study found Utah has the highest per capita consumption of online porn.

Archaeologists are still working on uncovering the delicate pictures and hope to have them preserved and on view to the public by 2014.

Ancient, Renaissance, and early modern graffiti was also found, raising the question of how old graffiti has to be before it stops being vandalism and starts being of historic interest.

The Colosseum has been quickly decaying in recent years, with bits falling off and archaeologists discovering that the building is beginning to lean.

[Image of gladiator fresco from the Roman amphitheater in Mérida, Spain courtesy Wikimedia Commons]

Temple To Phallic God Priapus Found In Bulgaria?

by Sean McLachlan on


There’s something weird going on in the Bulgarian Black Sea port of Sozopol.

Last year, Bulgarian archaeologists dug up the graves of two vampires and analyzed the purported bones of John the Baptist. Now the Sofia Globe reports they’ve found a temple to the Classical god Priapus. This deity, best known for his huge erect penis, was the god of fertility and its opposite – erectile dysfunction. He acted as a sort of metaphysical Viagra.

Bozhidar Dimitrov, head of the National History Museum, said archaeologists excavating in Sozopol have found a clay phallus inscribed with the words “to Priapus.” This sort of item was common as a votive offering to the god. There’s no report on whether a building was found on the site. Actual temples to Priapus are rare, since he was a minor god worshiped mostly in the countryside or in gardens. His fertility extended to plants as well as people and he was also the god of merchant sailors, which would have been important in a thriving port such as Sozopol.

Priapus was a popular god in the Roman Empire. The above image, courtesy Wikimedia Commons, is of a fresco in Pompeii. You can find statues of the god and little phallic amulets in any large collection of Roman antiquities. The British Museum has several. Jump the cut to see a cute little figurine of Priapus with a little surprise.
This is actually two shots of the same bronze figurine dating to the first century AD and found in Picardy, France. On the right it appears as a man walking with a cloak wrapped around him, but pull the top off and presto! Instant fertility. It’s on display in the Musée de Picardie à Amiens. Image courtesy Wikimedia Commons.