The protest could require military intervention, the police chief of Ottawa meanwhile suggested.

A delta-shaped tailless fighter-sized aircraft that looks like nothing we've seen before calls the secretive base home.

Nature - Immunologists have raced to work out how to protect against multiple variants of SARS-CoV-2. Their research has yielded a wealth of insights and a few surprises.

Nature - Two of the first people treated with CAR-T-cell cancer therapies are still in remission 12 years on.