The natural way
18 Mar 2010 source: bbc.co.uk
Once you understand the sun's arc it is possible to use it to find direction. For example, in the UK the sun rises in the northeast in midsummer, in the east in spring and autumn and in the southeast in midwinter. For everyone north of the Tropic of Cancer, including all of Europe and the US, the sun is always due south when highest in the sky, when is true midday. With practice it is possible to work out what it is doing at any time during the day and from anywhere in the world. Mid-mor ...
Climate linked to smaller birds
12 Mar 2010 source: bbc.co.uk
Songbirds in the US are getting smaller, and climate change is suspected as the cause. A study of almost half a million birds, belonging to over 100 species, shows that many are gradually becoming lighter and growing shorter wings. This shrinkage has occurred within just half a century, with the birds thought to be evolving into a smaller size in response to warmer temperatures. However, there is little evidence that the change is harmful to the birds. Details of the discovery are publishe ...