Culture | Page 2827 | Science Codex

Ancient turtle migrated from Asia to America over a tropical Arctic

In Arctic Canada, a team of geologists from the University of Rochester has discovered a surprise fossil: a tropical, freshwater, Asian turtle.

The find strongly suggests that animals migrated from Asia to North America not around Alaska, as once thought, but directly across a freshwater sea floating atop the warm, salty Arctic Ocean.

Published today in the journal Geology, the finding also suggests that a rapid influx of carbon dioxide some 90 million years ago was the likely cause of a super-greenhouse effect that created extraordinary polar heat.

Sociologist says this month's family murder-suicides only 'the tip of the iceberg'

BUFFALO, N.Y. -- A family sociologist at the University at Buffalo says this month's murder-suicides involving a family of four in Ohio and a family of five in California may be "just the tip of the iceberg."

Sampson Blair, Ph.D., associate professor of sociology at UB, says, "Family murder-suicide is still relatively uncommon, but I expect an increase in such incidents over the next few years because economic strain on families provokes depression and desperation."

Vaccines and autism: Many hypotheses, but no correlation

An extensive new review summarizes the many studies refuting the claim of a link between vaccines and autism. The review, in the February 15, 2009 issue of Clinical Infectious Diseases and now available online, looks at the three main hypotheses and shows how epidemiological and biological studies refute these claims.

Blue light destroys antibiotic-resistant staph infection

New Rochelle, NY, January 29, 2009—Two common strains of methicillin-resistant Staphylococcus aureus, commonly known as MRSA, were virtually eradicated in the laboratory by exposing them to a wavelength of blue light, in a process called photo-irradiation that is described in a paper published online ahead of print in Photomedicine and Laser Surgery. The article will appear in the April 2009 issue (Volume 27, Number 2) of the peer-reviewed journal published by Mary Ann Liebert, Inc.

New discovery may lead to new class of allergy drugs

If you've ever wondered why some allergic reactions progress quickly and may even become fatal, a new research report published in the February 2009 issue of the Journal of Leukocyte Biology (http://www.jleukbio.org) provides an important part of the answer.

Birds' strategic mobbing fends off parasitic invaders

Reed warblers use mobbing as a front line of nest defense against parasitic cuckoos, according to a new report published online on January 29th in Current Biology, a Cell Press publication. Cuckoos act as parasites by laying their eggs in the nests of other birds, reed warblers in particular, burdening their hosts with the trouble of raising young that don't belong to them.

Research uncovers surprising lion stronghold in war-torn central Africa

MADISON — Times are tough for wildlife living at the frontier between Uganda and the Democratic Republic of the Congo. Armies are reportedly encamped in a national park and wildlife preserve on the Congolese side, while displaced herders and their cattle have settled in an adjoining Ugandan park.

And yet, the profusion of prey in the region could potentially support more than 900 individuals of the emblematic African lion, according to new research – but only if immediate conservation steps are taken.

Wireless at WARP speed

Nothing kills innovation like having to reinvent the wheel. Imagine how dull your diet would be if you had to build a new stove and hammer out a few cooking pots every time you wanted to test a new recipe. Until just a couple of years ago, electronics researchers testing new high-speed wireless technologies faced just this sort of problem; they had to build every test system completely from scratch.

Water lilies inspire scientists to create large-scale graphene films

In the world of nanomaterials, scientists and engineers can create new structures with tiny building blocks as small as one billionth of a meter.

But in order to construct new materials and devices, researchers first need to understand how these tiny units interact with each other.

Dinosaur fossils fit perfectly into the evolutionary tree of life

A recent study by researchers at the University of Bath and London's Natural History Museum has found that scientists' knowledge of the evolution of dinosaurs is remarkably complete.

Evolutionary biologists use two ways to study the evolution of prehistoric plants and animals: firstly they use radioactive dating techniques to put fossils in chronological order according to the age of the rocks in which they are found (stratigraphy); secondly they observe and classify the characteristics of fossilised remains according to their relatedness (morphology).

Government services for young people at risk of drugs misuse may be doing more harm than good

Current government programmes aimed at reducing drug and alcohol use among young people may be ineffective and may even be doing more harm than good, according to a paper published today in Public Policy Research, the quarterly journal published today by the Institute for Public Policy Research.

Street-based programmes, by contrast, which aim to engage with young people on their own 'territory', have the potential to be more effective in reaching the most at-risk young people and are also likely to be cheaper to operate.

Discovery could lead to a new animal model for hepatitis C

During its career, the potentially fatal hepatitis C virus has banked its success on a rather unusual strategy: its limitations. Its inability to infect animals other than humans and chimpanzees has severely hampered scientists in developing a useful small animal model for the disease.

Early warning systems underestimate magnitude of large earthquakes

Scientists seek to create reliable early warning systems that accurately estimate the magnitude of an earthquake within the first seconds of rupture. In this paper published by the Bulletin of the Seismological Society of America, authors S. Murphy of University College Dublin, Ireland and S. Nielsen of the Instituto Nazionale di Geofisica e Vulcanologia, Roma, Italy look at the idea that an earthquake's final size can be determined during its initiation, rather than something that only becomes apparent at the end of the rupture.

American seniors living longer on less

"This is a wakeup call for America: Congress must act now to ensure economic stability for today's seniors and future generations."

Waltham, MA—Older Americans have experienced huge, negative financial shifts that now make it more difficult to enter retirement with sustainable economic security, a new study finds. Seventy-eight percent of all senior households are financially vulnerable when it comes to their ability to meet essential expenses and cover projected costs over their lifetimes.

Oetzi's last days

Another chapter in a murder case over 5000 years old. New investigations by an LMU research team working together with a Bolzano colleague reconstructed the chronology of the injuries that Oetzi, the glacier man preserved as a frozen mummy, received in his last days. It turns out, for example, that he did in fact only survive the arrow wound in his back for a very short time – a few minutes to a number of hours, but no more – and also definitely received a blow to the back with a blunt object only shortly before his death. In contrast, the cut wound on his hand is some days older.