One of the biggest challenges of the 21st century will be figuring out how to feed our rising global population. Now, some scientists are making the radical claim that growing more food won't be enough.
Breakfast can be a pretty depressing ordeal, especially on these cold, dark mornings. Why not genetically engineer your yoghurt to turn it into into a pharmacy-grade anti-depressant? That ought cheer the process up. Here's how to do it.