Dogs ears can detect the sound, humans can’t because the frequency ... Low power ultrasound is used so that doctors can see images of inside the body without causing damage.

videoSkin and sweating This short film combines CGI images with a real life story about a fire-fighter to show how the body manages to control temperature by sweating. The human ear. videoThe ...

Researchers used powerful technology to analyse thousands of individual cells at once, considering which genes are active.