Injury and degeneration of fibro-cartilaginous tissues, such as the knee meniscus and the intervertebral disc, have significant socioeconomic and quality-of-life costs. But the development of effective treatment strategies to address pathologies in these load-bearing tissues has been hindered by a lack of understanding of the relationships between their structure and their function.

Now, a team of researchers from the University of Delaware and the University of Pennsylvania has shed new light on this issue, laying the foundation for better treatment of injuries such as meniscus tears as well as new therapies for osteoarthritis and age-related degeneration.

Oxygen is crucial for the existence of animals on Earth. But, an increase in oxygen did not apparently lead to the rise of the first animals. New research shows that 1.4 billion years ago there was enough oxygen for animals - and yet over 800 million years went by before the first animals appeared on Earth.

Animals evolved by about 600 million years ago, which was late in Earth's history. The late evolution of animals, and the fact that oxygen is central for animal respiration, has led to the widely promoted idea that animal evolution corresponded with a late a rise in atmospheric oxygen concentrations.

It may seem strange to have a segment of the population, once confined to wealthy elites on the coasts but now growing nationwide, which believe that a particular process for food is not only healthier, but materially, culturally and ethically important. Yet the ultra-conservatives who make up the organic food customers, corporations, trade groups and lobbyists are not a modern invention. The engine was going to ruin agriculture too, and resistance to modern science and technology goes back at least 7,000 years.

Then, as now, the difference was that staying in the past would be 'better' for health. 

WASHINGTON --Although survival rates for people who suffer cardiac arrest outside a hospital are extremely low in most places, emergency physicians propose three interventions to improve survival rates and functional outcomes in any community and urge additional federal funding for cardiac resuscitation research in an editorial published online last Wednesday in Annals of Emergency Medicine ("IOM Says Times to Act to Improve Cardiac Arrest Survival ... Here's How").

A new study into magma ascent by geoscientists at the University of Liverpool has found that temperature may be more important than pressure in generating gas bubbles which trigger explosive volcanic eruptions.

In a paper published in Nature, researchers at the University's School of Environmental Sciences showed that as magma ascends in volcanic conduits, it heats up which can melt its crystal cargo and force the formation of bubbles. Importantly, they also showed that more bubbles are formed by heating than through decompression, which had been previously thought.

Biologists at the universities of York and Exeter have published new research which shows that an ancient symbiosis is founded entirely on exploitation, not mutual benefit.

The researchers concluded that a single-celled protozoa called Paramecium bursaria benefits from exploiting a green algae which lives inside it, providing its host with sugar and oxygen from photosynthesis.

Scientists have been debating for decades whether symbioses, like the Paramecium-Chlorella association, are based on mutual benefit or exploitation.

The common belief among academics was that both the protozoa and algae benefit.