Lack of access to clean water is still a problem for millions of people across the world, but new developments in nanotechnology and a water filter that resembles a humble tea bag could prove to be effective solutions.
Putting thousands of jellyfish in a blender to make a smoothie sounds like the start of bad joke. In fact, it's one way to source ingredients for a new generation of solar power solutions that could aid medical science and offer cheap energy.
Imagine walking down the supermarket aisle with a cheap device you could hold up to a tomato. If the sensor detects a pesticide residue, you'd know the "organic" label is a lie. Similar tools could track the chemical content of water in a stream, telling you if there was lead contamination and when it got there, or keep constant watch on a bridge and tell if a structural steel beam was at risk of collapse.