A century ago, a well-ventilated building was considered good medicine. But by the time Covid-19 arrived, our buildings could barely breathe. How did that happen? And how do we let the fresh air back in?
A review of archives suggests that efforts to protect Earth from contamination by any organism brought back from the lunar surface were mostly for show.
The United States’ struggle to respond to the virus has highlighted the importance of communicating with the public, sharing data and stockpiling vital supplies.