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Scientists used to think that hermaphrodites, due to their low position in the evolutionary scale, did not have sufficiently developed sensory systems to assess the “quality” of their mates.

A new work has shown, however, that earthworms are able to detect the competition by fertilising the eggs that is going to find its sperm, tripling its volume when there is rivalry. This ability is even more refined as they are able to transfer more sperm to more fertile partners.

Hermaphrodites, organisms that have both female and male reproductive organs, such as earthworms, are denied the right to choose their partner. However, a study by researchers at the University of Vigo has shown that worms are capable of telling whether another worm is a virgin or not, and triple the volume of sperm transferred during copulation if they detect a fertilisation competition risk.

The National Geographic Society and the international polling firm GlobeScan today unveiled a new mechanism for measuring and comparing individual consumer behavior as it relates to the environment.

“Greendex™ 2008: Consumer Choice and the Environment — A Worldwide Tracking Survey” looks at environmentally sustainable consumption and behavior among consumers in 14 countries. This first-of-its-kind study reveals surprising differences between consumers in developed and developing countries in terms of environmentally friendly actions.

This year’s results are a baseline against which results of future annual surveys will be compared, in order to monitor improvements or declines in environmentally sustainable consumption at both the global level and within countries.

You wouldn't think that clean air would be bad for the Amazon rainforest but UK and Brazilian climate scientists writing in Nature say just that.

Reduced sulphur dioxide emissions from less burning coal and increased sea surface temperatures in the tropical north Atlantic, are causing a heightened risk of drought in the Amazon rainforest.

A team from the University of Exeter, Centre for Ecology and Hydrology, Met Office Hadley Centre and Brazilian National Institute for Space Studies used the Met Office Hadley Centre climate-carbon model to simulate the impacts of twenty-first century climate change on the Amazon rainforest. They compared the model to data from the 2005 drought, which caused widespread devastation across the Amazon basin.

A new approach to estimating tumor growth based on breast screening results from almost 400,000 women is published today in Breast Cancer Research. This new model can also estimate the proportion of breast cancers which are detected at screening (screen test sensitivity). It provides a new approach to simultaneously estimating the growth rate of breast cancer and the ability of mammography screening to detect tumors.

The results of the study show that tumor growth rates vary considerably among patients, with generally slower growth rates with increasing age at diagnosis. Understanding how tumours grow is important in the planning and evaluation of screening programs, clinical trials, and epidemiological studies. However, studies of tumour growth rates in people have so far been based mainly on small and selected samples.

The first genome sequencing project of a mammal that lays eggs is complete and, like the animal itself, the DNA of the platypus is something of a patchwork.

The platypus, found in eastern Australia, including Tasmania, is one of the five species of mammals that lay eggs instead of giving birth to live young. The four species of echidna are the other mamimals that share this distinction.

The curious discovery of the duck-billed, egg-laying, otter-footed, beaver-tailed, venomous platypus in 1798, comfortable on land and in water, convinced British scientists that it must be a hoax. Sketches of its appearance were thought to be impossible.

But new research proves that the oddness of the platypus' looks isn't just skin-deep. Platypus DNA is an equally cobbled-together array of avian, reptilian and mammalian lineages that may hold clues for human disease prevention.

Rensselaer Polytechnic Institute graduating senior Jeffery Martin has put his basic knowledge of sugars to exceptional use by creating a lab-on-a-chip device that builds complex, highly specialized sugar molecules, mimicking one of the most important cellular structures in the human body - the Golgi Apparatus.

Among the most important and complex molecules in the human body, sugars control not just metabolism but also how cells communicate with one another.

Cells build sugars in a cellular organelle known as the Golgi Apparatus. Under a microscope, the Golgi looks similar to a stack of pancakes. The strange-looking organelle finishes the process of protein synthesis by decorating the proteins with highly specialized arrangements of sugars. The final sugar-coated molecule is then sent out into the cell to aid in cell communication and to help determine the cell’s function in the body.