Daily briefing: Solar storm pinpoints Viking presence in North America

Daily briefing: Solar storm pinpoints Viking presence in North America

Nature, Published online: 22 October 2021; doi:10.1038/d41586-021-02935-3

Researchers have dated a Norse settlement in Canada to AD 1021. Plus: why elephants are evolving to lose their tusks, and how mix-and-match COVID vaccines have aced the effectiveness test.
Source: Nature