Most animals appear symmetrical at first glance, but we're full of internal lop-sidedness. From the hand used to pick up a pencil or throw a baseball, to where language is generated in the brain, to the orientation of our internal organs, humans are a glut of asymmetries. Worms aren't so different: The roundworm Caenorhabditis elegans has nerves on its left and right sides that perform different functions. Like handedness, the determination of which nerves develop on which side seems random from worm to worm.

Genes provide the instructions used by the individual cells to produce the many different proteins that make up the body. Scientists are only beginning to appreciate, however, the extraordinary degree of control exercised over every step of the production process.

One of the world’s largest and least studied freshwater turtles has been found in Cambodia’s Mekong River, raising hopes that the threatened species can be saved from extinction.

The honeybee's alarm signal may not only bring help, but also attract the small hive beetle. Now, an international team of researchers has found that small hive beetles can detect some alarm pheromones at levels below that detected by honeybees.

Scientists at the Universitat Autònoma de Barcelona (UAB), in cooperation with the CSIC, have developed a new electro-chemical biosensor which detects the presence, in food, of very small amounts of atrazine –one of the most widely used herbicides in agriculture and which also has very long lasting effects on the environment- as well as antibiotics in food. The biosensor is faster, more portable and economic than the expensive laboratory methods which are used to detect contaminants, while having a very similar sensitivity. The system has been tested successfully to detect pesticides in samples of drinking water and commercial orange juice, as well as to detect traces of antibiotics in cow's milk.

The report, published in the prestigious international journal, the British Journal of Obstetrics and Gynaecology, found that the rise could not be explained by increases in clinical reasons for caesareans such as complications in pregnancy or labour/delivery and was more likely due to societal factors.