Science & technology | Cheap microscopes
Microscopes made of paper may help the diagnosis of tropical diseases
Buffet breakfasts could be less wasteful
A computer model has found some counterintuitive solutions
The Climate Issue newsletter: The blue marble, then and now
Our planetary-affairs editor, Oliver Morton, looks at the connection between space travel and climate science
Sir Demis Hassabis wants to automate drug design
We speak to the boss of Google DeepMind
Mummified reptiles are revealing how breathing evolved
The question had previously been up in the air