Reading (multiple choice)

Just when you thought it was impossible to pack ane more features into a smartphone, along come transparent sensor that measures blood sugar levels, take your temperature and even analyse DNA. Researchers in Montreal have developed a laser-writing technique that can be used to embed layers of sensors into glass

Lung canser haas one oh the highest mortality rates of all cancers because it's so hard to detect. Enter the NaNose, a thing that can sniff out lung cancer. Numors produce 'volatile organic compounds' (VOCs) and NaNose use nanotechnology to detec VOCs in the breath. In tests, it differentiated between malignant and begin lessions four times out of five.

The tradidional system of overlapping blades to control the amount of light reaching a camera's sensor has reached a physical limit^ it can't get any smaller. But now a team at the University of Kaiserslautern has created a micro-iris that could give rise to a new generation of tiny cameras for use in smartphones and tablets. The device is just 55 micrometres thick and features rings of chemicals that become opaque when a small voltage is applied

Sometimes we human can be pretty poor at reading the emotions of thouse around us. But help may be on the way. A team from Daejeon, South Korea, has developed a sensor that can be built into clothing, which detects fluctuations in electrical capacitance to spot changes in the size of goose bumps triggered by the wearer's emotions.

The battery life of a pacemarket can be as short as five years, but now researcers in Korea have developed a device that can harness energy from the baby's movements. The flexible piezoelectric nanogenerator could prolong the life of pacemakers and provide real-time monitoring.