Many countries are winding back COVID-19 restrictions, but governments should be continuing to promote the importance of voluntary mask use and catching up outdoors.
Quantum computers, making greenhouse gases useful, COVID-19 infection from droplet spread and water security were some of the most popular engineering stories in 2020.
A study led by Professor Raina MacIntyre raises questions about the risks of infection for people singing in groups, especially in poorly ventilated rooms.
Just because someone isn't wearing a mask doesn't mean they don't want to. They might have a disability or medical condition you can't see that makes wearing a mask difficult or distressing.
