Dr Amy Davies (Heriot-Watt University) invites you to delve into the deep oceans and dark forests where enchanting fluorescent creatures such as jellyfish and fireflies live. Their fluorescence has allowed scientists to make other animals that can glow in the dark. More importantly it has enabled us to see the invisible worlds of the many cells that make up all life on earth. Now that we can see what's really going on, what's next? Finding cancer cells or infectious viruses and bacteria? We can see active parts of the brain, so is mind reading next?