Category: Living World

Georgia’s Own Doomsday Stonehenge Monument

By Guest Blogger | September 9, 2013 3:01 pm

By Jill Neimark

georgia guidestones

“Planned genocide has begun,” read the Facebook entry on one of the groups I browse daily. The link: a picture of five monoliths looming like an American Stonehenge over a lush and lonely hill in remote Elberton, Georgia. I was only an hour away at the time, and decided to visit them in person.

The nearly twenty-foot granite slabs, known as the Georgia Guidestones, have sparked controversy around the world – praised by Yoko Ono, defaced by conspiracy theorists, featured on the History Channel, and the subject of the conspiracy web series Guidestones. The monument – five upright stones topped by a capstone – weighs nearly 240,000 pounds and is inscribed in eight languages with ten instructions for humans post-apocalypse. Three decades after being erected, the monument’s true purpose is still being argued, and its quasi-commandments can seem either sincere or satanic.

Read More

CATEGORIZED UNDER: Environment, Living World, Top Posts

Lab-Grown Burger, Made From Cow Cells, Gets a Taste Test

By Guest Blogger | August 5, 2013 4:09 pm

By Katie Engelhart

The burger made from cultured cells. Credit David Parry/PA

The verdict is in. The world’s first hamburger made entirely of lab-grown, “cultured beef” tastes… OK.

It’s a little bland, tasters reported of the patty, which cost over $330,000 to produce. And it lacks juiciness. (The burger contains no fat.) But otherwise, it has a good “mouth feel” and a solid texture. Most importantly: it tastes like it once lived and breathed and mooed.

Scientists predict that you will be eating patties just like it in 10 or 20 years.

A Tasty First

Today, hoards of journalists gathered at a production studio in west London for a historic event: the unveiling of the world’s first-ever cultured beef* burger—engineered by Maastricht University professor Mark Post. In the frenzied minutes before the launch began, reporters and film crews gathered around platters of free sandwiches. Ham, cheese, tuna and the perennial British favorite “prawn mayo” were all on offer, though roast beef was noticeably absent.

Inside the auditorium, flashing screens welcomed the crowd. A promotional film opened with Google founder Sergey Brin, who was revealed as the anonymous donor behind the burger product. Brin, captured in an orange t-shirt and Google Glass, spoke of cultured meat’s transformative potential. The film then switched to a historical reenactment of hunter-gatherers roasting animal bones over an open flame.

Read More

CATEGORIZED UNDER: Living World, Top Posts
MORE ABOUT: stem cells

During Cicada Boom, Birds Mysteriously Vanish

By Guest Blogger | June 18, 2013 10:05 am

By Madeline Bodin

cicadas

With thousands of newly-hatched 17-year cicadas blanketing the Eastern U.S., residents would be forgiven for not noticing a less conspicuous absence: birds.

Bird surveys have repeatedly shown a mysterious trend of a population downtick in areas of cicada emergence. It’s the exact opposite of what might be expected—crows, blue jays and cardinals are among the species affected, and they feed on insects. And it’s fascinated ornithologist Walter Koenig for years.

“The birds are just not coming in there to eat them,” says Koenig, a senior scientist at the Cornell University Laboratory of Ornithology. “Why aren’t the birds taking advantage of the cicadas? The fact that there may not be birds around seems like a good explanation.” Now, this spring is the first time he’s been able to measure his theories against a real-life emergence.

Read More

CATEGORIZED UNDER: Living World, Top Posts
MORE ABOUT: birds, cicadas, insects

Researcher Studying Endangered Elephants Flees Central African Republic

By Guest Blogger | June 10, 2013 11:55 am

By Kenneth Miller

Photographs taken by Andrea Turkalo of her elephants.

The border guards, wary of advancing rebels, fired their guns in the air as three motorized skiffs approached along the Sangha River in the late March night. But the boats’ occupants were unarmed foreigners, fleeing a bloody insurrection that had gripped the Central African Republic (CAR). Among the refugees was elephant researcher Andrea Turkalo, carrying $25,000 in cash and six hard drives—packed with more than 20 years of data—which she’d grabbed before fleeing her jungle compound.

Turkalo, 60, is a field biologist for the Wildlife Conservation Society, and one of the world’s foremost experts on African forest elephants (Loxodonta cyclotis). Since 1990, she’s been observing the elusive pachyderms—thought to be a different species from their larger, curvier-tusked, savannah-dwelling cousins (Loxodonta africana)—at a clearing known as Dzanga Bai, in the CAR’s southwestern rainforest. But her life’s work now hangs in the balance, as does the fate of the elephants themselves.

Read More

CATEGORIZED UNDER: Living World, Top Posts
MORE ABOUT: elephants

Laws Lag Behind Science in De-Extinction Debate

By Guest Blogger | June 5, 2013 9:39 am

By Virginia Gewin

The passenger pigeon is one animal being discussed for de-extinction. Image courtesy National Park Service.

Chuck Bonham, director of the California Department of Fish and Wildlife, is no stranger to potentially controversial species restoration plans: His agency will soon poison non-native fish in an effort to re-establish the Paiute cutthroat trout to its historic range.

Still, the practicalities of efforts to revive extinct species raised mixed emotions among Bonham and participants at the “De-Extinction: Ethics, Law and Politics” conference held at the Stanford Law Auditorium last Friday.

Addressing the scientists in the audience, Bonham (who made clear he wasn’t speaking for the agency) said he and colleagues were “scared, worried, thrilled, excited, and angry at you guys for exploring this idea.”  Yet, with the planet facing massive biodiversity loss, he said, de-extinction may be one of the few options for protecting species in perpetuity.

Read More

CATEGORIZED UNDER: Living World, Top Posts
MORE ABOUT: de-extinction, policy

Dinosaur’s Flesh Wound Preserved in Fossil Record

By Guest Blogger | February 20, 2013 3:49 pm

 By Jon Tennant

Hadrosaur bones, courtesy U.S. Bureau of Land Management.

Fossils, as we typically think of them, tell us about the death of an animal. The teeth, bones, shells, fragmented pseudopods and other weird and wonderful bits of carcass all only ever reflect one thing: a permanent geological limbo. These types of fossil are known as body fossils.

The other major group of fossils, that are generally less common, less researched, less known about, but arguably more important for guiding our understanding of the history of life on Earth, are trace fossils. The study of trace fossils is called ichnology, and the fossils don’t represent death; they represent life, behavior, activity. Often trace fossils are actually found in or on body fossils—anything from boring holes from bivalves on other bivalves, to bite marks on bones detailing a poor creature’s last painful seconds as a living animal. Or, in this case, an ancient injury preserved on a dinosaur’s skin.

Dinosaur skin is one of the rarest treasures the paleontological record can reveal to us. We now have a pretty good idea about the texture and nature of dinosaur skin, thanks to a couple of exceptional “dinosaur mummies” and the occasional fragments of skin preserved not as a mold of skin impressed on the surrounding sediment but of the actual fleshy flesh.

Read More

CATEGORIZED UNDER: Living World, Top Posts
MORE ABOUT: dinosaurs

Chasing the Cascades’ Missing Grizzlies

By Guest Blogger | February 19, 2013 12:55 pm

By Eric Wagner

The first sign that we’re close is a sickly sweet odor among the otherwise clean scents of fir and spruce. Scott Fitkin, a biologist with the Washington Department of Fish and Wildlife, pushes through a thatch of branches. “Here it is,” he says, coming to a large brush pile.

We are near Castle Mountain in Washington’s Pasayten Wilderness, about ten miles south of the US-Canada border. The pile sits within a perimeter of barbed wire called a snare corral. The brush is meant to mimic a grizzly bear food cache and so pique the bears’ interest. To entice them still more, Fitkin has poured a slurry of fermented salmon guts and cows’ blood over it. Now, in late September, the pile is a shambles—a good sign. If the bears have taken the bait, then they’ve left behind something even more valuable.

Fitkin begins a careful circuit, examining each barb. On four he finds fur, varying from a few strands to a generous tuft. He tweezes each barb’s worth into an envelope. DNA analysis will tell him later what species the hair belongs to, but he isn’t getting his hopes up: all of them are black, and probably from black bears.

Fitkin wants grizzlies. He has searched for them in these mountains for more than 20 years and has yet to see one. But in this, the final year of a three-year survey, he and his colleagues have gone all out. They’ve set up dozens of snare corrals throughout remote parts of the Cascade Mountains, miles from anywhere. If there are grizzlies to be found, then they will find them. Or so they hope.

Read More

CATEGORIZED UNDER: Living World, Top Posts

Yes, Ayn, There Is a Social Instinct

By Guest Blogger | October 5, 2012 2:51 pm

Eric Michael Johnson has a master’s degree in evolutionary anthropology focusing on great ape behavioral ecology. He is currently a doctoral student in the history of science at University of British Columbia looking at the interplay between evolutionary biology and politics. He blogs at The Primate Diaries at Scientific American, where this post originally appeared.

Rand-by-Nathaniel-Gold“Rand” by Nathaniel Gold

“Every political philosophy has to begin with a theory of human nature,” wrote Harvard evolutionary biologist Richard Lewontin in his book Biology as Ideology. Thomas Hobbes, for example, believed that humans in a “state of nature,” or what today we would call hunter-gatherer societies, lived a life that was “solitary, poor, nasty, brutish and short” in which there existed a “warre of all against all.” This led him to conclude, as many apologists for dictatorship have since, that a stable society required a single leader in order to control the rapacious violence that was inherent to human nature. Building off of this, advocates of state communism, such as Vladimir Lenin or Josef Stalin, believed that each of us was born tabula rasa, with a blank slate, and that human nature could be molded in the interests of those in power.

Read More

CATEGORIZED UNDER: Living World, Top Posts

Under Controlled: Why the New GMO Panic Is More Sensational Than Sense

By Guest Blogger | September 21, 2012 10:29 am

Scicurious is a PhD in Physiology, and is currently a postdoc in biomedical research. Follow on Twitter @Scicurious and read her blogs at Scientific American and at Neurotic Physiology.

A new toxicology study states that rats eating genetically modified food and the weedkiller Roundup develop huge tumors and die. But many scientists beg to differ, and a close look at the study shows why.

Genetically modified organisms (GMOs) have always been a controversial topic. On the one hand are the many benefits: the higher crop yields from pesticide- and insect-resistant crops, and the nutritional modifications that can make such a difference in malnourished populations. On the other side is the question that concerns many people: We are modifying the genes of our food, and what does that mean for our health? These are important question, but the new study claiming to answer them misses the mark. It has many horrifying pictures of rats with tumors, but without knowledge about the control rats, what do those tumors mean? Possibly, nothing at all.

The recent study, from the Journal of Food and Chemical Toxicology has fueled the worst fears of the GMO debate. The study, by Italian and French groups, evaluated groups of rats fed different concentrations of maize (corn) tolerant to Roundup or Roundup alone, over a two year period, the longest type of toxicology study. (For an example of one performed in the U.S., see here.) The group looked at the mortality rates in the aging rats, as well as the causes of death, and took multiple samples to assess kidney, liver, and hormonal function.

The presented results look like a toxicologist’s nightmare. The authors reported high rates of tumor development in the rats fed Roundup and the Roundup-tolerant maize. There are figures of rats with visible tumors, and graphs showing death rates that appear to begin early in the rats’ lifespan. The media of course picked up on it, and one site in particular has spawned some reports that sound like mass hysteria. It was the first study showing that genetically modified foods could produce tumors at all, let alone the incredibly drastic ones shown in the paper.

Read More

Older Dads Give Good Telomeres, But Longevity? Not So Much

By Sophie Bushwick | August 2, 2012 11:23 am

Sophie Bushwick (Twitter, Tumblr) is a science journalist and podcaster, and is currently an intern at DISCOVERmagazine.com. She has written for Scientific American, io9, and DISCOVER, and has produced podcasts for 60-Second Science and Physics Central

Human chromosomes (grey) capped by telomeres (white)
U.S. Department of Energy Human Genome Program

Renowned biologist Elizabeth Blackburn has said that when she was a young post-doc, “Telomeres just grabbed me and kept leading me on.” And lead her on they did—all the way to the Nobel Prize in Medicine in 2009. Telomeres are DNA sequences that continue to fascinate researchers and the public, partially because people with longer telomeres tend to live longer. So the recent finding that older men father offspring with unusually lengthy telomeres sounds like great news. Men of advanced age will give their children the gift of longer lives—right? But as is so often the case in biology, things aren’t that simple, and having an old father may not be an easy route to a long and healthy life.

Every time a piece of DNA gets copied, it can end up with errors in its sequence, or mutations. One of the most frequent changes is losing scraps of information from each end of the strand. Luckily, these strands are capped with telomeres, repeating sequences that do not code for any proteins and serve only to protect the rest of the DNA. Each time the DNA makes a copy, its telomeres get shorter, until these protective ends wear away to nothing. Without telomeres, the DNA cannot make any more copies, and the cell containing it will die.

But sperm are not subject to this telomere-shortening effect. In fact, the telomeres in sperm-producing stem cells not only resist degrading, they actually grow. This may be thanks to a high concentration of the telomere-repairing enzyme telomerase in the testicles; researchers are still uncertain. All they know is that the older the man, the longer the telomeres in his sperm will be.

Read More

NEW ON DISCOVER
OPEN
CITIZEN SCIENCE
ADVERTISEMENT

Discover's Newsletter

Sign up to get the latest science news delivered weekly right to your inbox!

The Crux

A collection of bright and big ideas about timely and important science from a community of experts.
ADVERTISEMENT

See More

ADVERTISEMENT
Collapse bottom bar
+

Login to your Account

X
E-mail address:
Password:
Remember me
Forgot your password?
No problem. Click here to have it e-mailed to you.

Not Registered Yet?

Register now for FREE. Registration only takes a few minutes to complete. Register now »