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Easter Island's wonderful and mysterious stone statues, or Moai have gazed inland across the island for hundreds of years. Some of the Moai wear red stone hats, called pukao. How did the Easter Islanders get the pukaos on top of the Moai?

Dark matter — Stalked from every which way

Dark matter is hunted in space, in the Solar system and in distant galaxies. Signs of its interactions, its fingerprint and its decay are pursued. Whether WIMP, axion or neutrino, though unseen, the net is tightening around it.

Acidic oceans killed off ancient marine species

Massive die-offs of almost every marine species millions of years ago were the result of a surge of carbon dioxide in the world's oceans, creating acidic seas.

Like a fine wine, Vladimir Lenin's body improves with age

For someone 145 years old, Vladimir Lenin looks really great lying in state in Moscow's Red Square. But there is a secret to maintaining such a robust picture of health, even though the founder of the Soviet Union has been dead for 90 years.

Insight into how a mother mouse hears her pup calling

The hormone oxytocin activates neurons that trigger female mice to respond to the distress calls of lost pups. This has come from a new research study.

Deep-brain stimulation helps Parkinson's

Deep-brain stimulation appears to treat slow movement, tremor, and rigidity in Parkinson’s patients. This is by reducing synchronicity of neural activity in the motor cortex.

Cannabidiol halts seizures in new study

The marijuana-derived compound cannabidiol has shown promise in treating rare forms of epilepsy, the type that cause children to have seizures multiple times a day.

Search for ancient Teotihuacan king's tomb takes mercurial twist

A six-year search for a royal tomb may have finally paid off for an archaeologist excavating a tunnel deep underneath a towering pre-Aztec pyramid in Mexico. At the end of the tunnel, he discovered a shimmering pool of liquid mercury.

Science helps solve stomach ulcers in cattle

Researchers looking into whether stomach ulcers in cattle are related to the presence of certain bacteria (as is the case with humans). They found that this not the case. This could lead to alternative treatments for livestock.

Remote tribespeople carry antibiotic resistant genes

Researchers have discovered antibiotic resistance genes in the bacteria of a South American tribe never exposed to antibiotic drugs. This suggests some bacteria have always been antibiotic resistant.

Why bats don’t crash into each other is revealed

This may seem like the start of a riddle, but why don’t bats fly into each other? The answer lies in bats seemingly following some agreed rules of the air.

Waterproof bacteria inspire special coatings

A study into how bacteria protect themselves, by forming a type of waterproof raincoat, could lead to a new generation of products designed to protect crops from disease.

Shifting through sewage to get valuable metals

Sewage, one of the most unpleasant waste products, may contain valuable metals. While not exactly worth its weight in gold, scientists are looking at ways of extracting key elements from the sludge.

Should human germline modification be halted? Special

Following recent reports about experiments on embryos, the Center for Genetics and Society is calling for a halt to experiments aimed at the creation of genetically modified human beings.

Think 'Jaws' meets a kangaroo and you've got a pocket shark

Cute as a small whale, with two pockets, sort of like a kangaroo, would be an apt description of what is called a pocket shark. Only two of these strange ocean creatures have ever been found.

Woolly Bully: Scientists can now de-extinct the woolly mammoth

The entire genome of the extinct woolly mammoth has now been sequenced and for the first time science has a blueprint, a step-by-step guide or manual, on how to assemble one. There are no plans to do so — yet.

NASA picks top team to hunt for aliens

NASA has just got serious about finding alien life. The space agency has picked a top team of scientists to hunt for extraterrestrials – and you may be able to participate.

Op-Ed: What you need to know about Hubble's 25th anniversary

That young whippersnapper the Hubble Space Telescope has now made a quarter of a century. Just when you’d think it’d be settling down and having kids, or at least dating more, it’s still rampaging around the skies looking for dazzling things.

Meet Vancouver's most polluted and 'flameproof' bird

A Cooper's hawk found near a Vancouver-area waste transfer station is thought to be the most polluted bird in the world. While it is a stretch to say it is "flameproof," it had enough of a certain chemical in its liver to qualify it as such.

Immune cells help beneficial bacteria triumph over bad

The immune system helps to shape the balance of good or bad bacteria in the human gut. Researchers have found a protein on white blood cells affects the balance of the microorganisms in the gut.

Scientists urge moratorium after Chinese 'edit' human embryos

Global scientists on Thursday renewed calls to halt controversial research to genetically edit human embryos after a Chinese team published details of a stunted but breakthrough attempt in this new frontier in science.

Unknown dark force may be interacting with dark matter

Scientists have discovered what seems to be self-interacting dark matter through a previously unknown source, labelled the "dark force."

Alzheimer's breakthrough drug may 'dramatically change' treatment

Researchers in the U.K. will soon begin testing a drug that they say may be the breakthrough for Alzheimer's Disease and other dementia that the world awaits. The drug, Liraglutide, is already on the market as a treatment for diabetes.

Need a hangover cure? 1,900-year-old Greek text has the answer

After humans discovered the delights of alcoholic beverages, they soon realized they needed a cure for the aftereffects of drinking too much. There have been many questionable cures discovered, including one on an ancient Greek papyrus found in Egypt.

Oort Cloud — Ice and dust encircles Sun at 100,000 AUs above

Jan Oort's Comet Cloud is getting attention again because of its role in a new model of Galactic disc dark matter that connects the interaction between dark matter and Oort comets with Earth's mass extinctions. But what is the Oort Comet Cloud?

Slowing down the heat to make a good beer

One of the problems with making beer is that the yeast used generates a lot of heat and the heat, in turn, damages the yeast and this can lead to occasional bad tasting beer and loss of vital quantities of brewer’s yeast.

Near-Earth Asteroid 2015 HD1 narrowly missed Earth on Tuesday

Asteroid 2015 HD1, a small and faint asteroid, about 50 feet across, missed Earth by a hair's breadth at about 3 a.m. CDT ( 8 UTC), Tuesday, April 21, hurtling past at just 45,600 miles (73,400 kilometers) or 0.2 lunar distance.

Geological catastrophes pinned to Galactic disc dark matter

A recent study suggests that cycles of mass extinction, magnetic direction reversals, and crater impacts on Earth may be significantly influenced by rhythms of Earth's interaction with dark matter in the Galactic plane.

Nano sandwich creates super rechargeable batteries

Researchers have created tiny "sandwiches" made of nanosheets. These are the basis of a new generation of rechargeable batteries.

Blood test shows promise to predict breast cancer

Can scientists discover cancer before it appears in the body? According to researchers at the University of Copenhagen, a simple sample of blood is all it takes to determine if a woman will get breast cancer within two to five years.

Strange gigantic supervoid or Cold Spot found in universe

A mysterious "hole in space" called a "supervoid" has baffled scientists since it was first found in 2004. Now a new theory is trying to explain its highly unusual features.

Bone munching worms of the past

Recently discovered ocean worms, known for feasting on whale bones, date back to prehistoric times. Long-ago the worms fed on the carcasses of giant marine reptiles, according to a new study that has plunged the depths of the sea.

Study: Alzheimer's brain shrinkage slowed by Omega 3s, Vitamin B

The authors of a study on Alzheimer's Disease and other dementia presented at a conference last week say they've made a major breakthrough in treating the illness. The study shows vitamins halt the brain shrinkage that leads to memory loss.

Anxiety linked to continual experiences of déjà vu

Frequent experience of déjà vu and anxiety related to university life coupled with unfortunate experimentation with LSD make a young man's life a continual time-loop of seemingly relived events, a condition newly described as psychogenic déjà vu.

Longest-running wolf study is running out of wolves

A predator-prey study started 57 years ago will have to end, or possibly shift direction next year because the wolves being studied are nearly extinct. The population of predators on Isle Royale is down to three lone wolves.

HIV antibody therapy shows success

A new study has revealed that delivering antibodies to HIV-infected people can lower levels of the virus. This offers hope as a new treatment for those infected with the virus.

How Europeans became white-skinned

The mystery of why dark-skinned peoples, who migrated north from Africa, became white-skinned Europeans may have been solved.

How many recessive lethal mutations do we carry?

Scientists report an estimate of the average number of recessive lethal mutations people carry. The figures are quite surprising.

Can our metabolism change our memory?

Fruit flies learn and remember a preference for lower-calorie typical lab nutrition over high-calorie food, according to a new study.

Japan's population falls for fourth straight year

On Friday the Japanese Ministry of Internal Affairs and Communications released the latest figures on the country's natural population decline, and for the very first time, the natural decline topped 250,000.

Should an experimental ALS drug be made available?

Biotech company Genervon has requested accelerated approval for its experimental ALS drug after a small but promising Phase 2 clinical trial. Will drug authorities allow its use?
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