Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Problems with reproducibility bedevil research on adult stem cells, yet treatments using the cells are moving rapidly into human clinical trials. Those working in the field need to adopt more robust experimental approaches.
It's only when you begin to see the world as birds do — detecting light in the ultraviolet spectrum — that the full subtlety of their behaviour is revealed. Rex Dalton catches a glimpse.
A little alcohol can be good for you. But, collectively, our drinking habits are seriously damaging our health. Can public-health officials promote the message of moderation? Helen Pearson investigates.
The potential use of stem cells as agents of repair in human disease makes them the subject of high-profile studies. But we should be wary of prematurely pushing laboratory research into clinical practice.
At intervals, the polarity of the Earth's magnetic field reverses. The timescale for this reversal is unclear — in fact, it seems to depend on the latitude of the site from which the geological data are extracted.
Mars is a very watery planet, but all the water seems to be frozen. Divining the amount and distribution of this water, past and present, is essential for understanding martian climates, and more.
What gives cooperation an evolutionary edge? Two features of a population — spatial structure and finite size — are factors in the success of any strategy, although more subtle than we thought.
