大象传媒

The Future For Stem Cells
Two research teams, one in Japan, the other in the United States, have independently succeeded in producing human stem cells using a new method that doesn鈥檛 first require the creation of a cloned embryo. Could this new work signal the end of embryonic stem cells and the controversy that goes with them?

Climate Change and World Food Production
Up to now, scientists believe that world food production will be largely protected by the negative effects of climate change such as soaring temperatures, by the increased amount of carbon dioxide in the atmosphere, which helps plants to photosynthesise. However, as Sue Broom discovers, new research out in the field is showing just the opposite, dramatically lowering crop yields by more than 20 percent.

The Egg and Sperm Race
It鈥檚 always been assumed that in the womb, it鈥檚 the fastest fittest sperm that reaches the egg first. But new research from the University of Sheffield has shown for the first time that female mammals are able to change the bio-chemical environment within the womb and 鈥渃hoose鈥� which sperm are likely to succeed. Could this have profound consequences for the success rate of IVF?

The Science of Smoking
The ends may justify the means in business or politics but not in science, argues Mike Siegel, a Professor of Public Health in Boston. In his column for Leading Edge, he condemns anti-smoking groups for misrepresenting the science in order to promote policies to have smoking banned in all public places, inside or out.