Welcome Home Taikonauts!

by Sean McLachlan on

China has made another great leap forward in their space program. At 2:05 GMT today, the Shenzhou-9 spacecraft landed safely in Inner Mongolia.

The capsule contained three Chinese taikonauts (astronauts), including Major Liu Yang, China’s first female taikonaut to go on a mission. The state press has nicknamed Major Liu Yang the “little Flying Knight,” which seems a wee bit condescending for such a brave pioneer.

The crew had been in space for 13 days and had docked with the Tiangong-1 space platform, the nucleus of what will become China’s space station by 2020. Above is a Wikimedia Commons diagram of Shenzhou-9 (right) docked with Tiangong-1 (left). The landing was broadcast live on state television.

As Chinese space missions become more common, the question becomes what to call their crews. The Chinese government doesn’t seem to be able to decide. Depending on the source and the language of the official statement, they’re variously referred to as astronauts, cosmonauts, “tàikōng rén” (“spacemen”) or taikonauts, which the Oxford English Dictionary defines as “a hybrid of the Chinese term taikong (space) and the Greek naut (sailor).” Personally I think taikonaut sounds the coolest.

Want to learn more? Check out the Go Taikonauts! fan page.

World’s Oldest Cave Art Found In Spain

by Sean McLachlan on

Archaeologists analyzing prehistoric paintings in Spain have discovered the earliest example of cave art.

El Castillo Cave in Cantabria on Spain’s northern coast was one of the UNESCO World Heritage Sites investigated for the study. The earliest dates were a minimum of 40,800 years ago for a red disk, 37,300 years for a hand stencil, and 35,600 years for a club-shaped symbol. The red disk is at least 4,000 years older than anything previously found in Europe and arguably the oldest cave art anywhere.

These early dates have sparked an interesting debate. The paintings are from the transition period between Neanderthals and the arrival of modern humans. No cave art has been firmly attributed to the Neanderthals and scholars have long debated the level of their intelligence.

Researchers used uranium-series disequilibrium dates of calcite deposits overlying art in eleven caves to determine the dates. Like radiocarbon dating, this technique measures the change in radioactive isotopes. Unlike the more common radiocarbon dating technique, however, which studies the half-life of carbon 14, this technique studies the rate of decay of uranium 234 into thorium 230, a process that happens at a precise rate. It can date calcite up to 300,000 years old.

Very thin films of calcite were sampled from just above the paintings. Being on top of the paintings, they are younger than the art, thus the paintings could be centuries older than the minimum dates given.

The results have been published in the journal Science. Meanwhile, the team is sampling more cave art in the hope of finding even earlier dates.

Cougars Regaining Numbers, Spreading Habitat

by Sean McLachlan on


Cougars have been declining in number for a century now, as victims of hunting and loss of habitat. Now the BBC reports they’re making a comeback. The population is increasing and they are spreading out of their usual western habitats back into eastern and northern areas where they haven’t been seen for many years.

They’ve been spotted from Texas to Canada, and one even made it to Connecticut last year, only to get killed by a car.

Naturalists say that restrictions on hunting and the return of some of their prey, like elk and mule deer, have increased their numbers and forced these solitary animals to search further afield in search of a hunting range.

Some have raised concerns about cougar attacks. Although experts say that cougars generally avoid humans, cougars must be treated with caution like any wild animal. From 2001 through 2010, there have been 36 injuries and four deaths caused by cougars in the U.S. and Canada.

By way of comparison, lightning killed 26 people in the U.S. in 2011 alone. Environment Canada reports, “each year lightning kills approximately 10 Canadians and injures approximately 100 to 150 others.” So it appears that, much like the common fear of wolves and sharks, fear of cougars is based less on their real threat than it is on urban ignorance of nature.

[Photo courtesy Art G]

Happy Birthday, Hubble Space Telescope!

by Sean McLachlan on


The Hubble Space Telescope has been in orbit for 22 years today, and to celebrate, NASA has released this awesome image of the Tarantula Nebula, also known by its less romantic scientific name of 30 Doradus.

A nebula is a massive cloud of gas and dust in which some areas are coalescing and igniting into stars. The Tarantula Nebula is located in the Large Magellanic Cloud, a galaxy orbiting our own Milky Way galaxy. The light comes from thousands of stars in its center that illuminate the clouds and filaments around them.

In addition to being one of the most groundbreaking scientific instruments of the late twentieth century, Hubble is a team player. This image is a composite from the Hubble and two other space telescopes: Chandra X-ray Observatory and the Spitzer Space Telescope, an infrared instrument my super-cool astronomer wife uses. NASA says:

“The Hubble data in the composite image, colored green, reveals the light from these massive stars along with different stages of star birth, including embryonic stars a few thousand years old still wrapped in cocoons of dark gas. Infrared emission data from Spitzer, seen in red, shows cooler gas and dust that have giant bubbles carved into them. These bubbles are sculpted by the same searing radiation and strong winds that comes from the massive stars at the center of 30 Doradus.”

Happy Birthday, Hubble!

Photo courtesy NASA. To see the image in its full 3000-pixel glory, click here.

Shroud Of Turin One Of 40 Fakes, Historian Says

by Sean McLachlan on

The Shroud of Turin has been causing controversy for centuries now. The linen cloth, measuring 14 feet by 4 feet, has what appear to be bloodstains on it. Also, the image of a wounded man can be seen, an image that becomes clearer when looked at as a photographic negative.

Now historian Antonio Lombatti of the Università Popolare in Parma, Italy, says the Shroud of Turin is a fake, and not only that, it’s not a very original one. About forty pieces of cloth purported to be the burial shroud of Jesus circulated in Europe during the Middle Ages and Renaissance. Religious relics were popular then and now.

Lombatti say the shroud was given to a French knight in Turkey in 1346. This is the first concrete record of the Shroud and agrees with radiocarbon analysis of the linen. In 1988, the University of Oxford, University of Arizona, and the Swiss Federal Institute of Technology independently tested parts of the Shroud and each said it dates to sometime between 1260-1390.

The photographic negative image was well within the ability of medieval technology as far back as the eleventh century A.D., according to one researcher who made his own shrouds using medieval techniques.

Also, John 19:40 and 20:6-7 clearly state that Jesus was wrapped in several strips of linen, not just one, and that his head was wrapped in a separate cloth.

None of this, of course, will dissuade the thousands of believers who flock to the Cathedral of Saint John the Baptist in Turin, where the Shroud is kept and (rarely) exhibited.

[Photo courtesy Wikimedia Commons]