An extraordinary year is drawing to a close. ETH News takes a look back at the highlights that emerged amidst difficult and unsettling times, at ingenious ideas, fascinating science and solidarity in action during – and despite – the coronavirus pandemic. By playing the video you accept the privacy policy of YouTube.Learn moreOK (Video: Omar Zeroual / ETH Zurich) January New year, new inventions: ETH researchers created an 18-carat gold that is ten times lighter than normal 18-carat gold. They achieved this by replacing metallic alloy elements with a matrix of protein fibres and plastic. Another invention celebrated its world premiere: a research team developed a machine that can keep a liver alive outside the body for a week, making it possible to treat a liver prior to transplantation.