2 results
- Article
- Article
What is air, and how do we know?
| Hasok ChangTracy Satchwill
Watching bubbles in fermenting beer led 18th-century scientist Joseph Priestley to invent sparkling water – and to discover that different gases make up the air we breathe.
- Book extract
- Book extract
Winter blues and the story of SAD
| Linda Geddes
In ‘Chasing the Sun‘ Linda Geddes reveals why for some people, winter is literally depressing, showing how we first came to recognise seasonal affective disorder (SAD).