'People should be alarmed': air pollution in US subway systems stuns researchers | Environment

At some point during the past 20 years, over five million of us downloaded SETI@home, putting our computers to work looking for aliens while we went about our lives. Then, in March 2020, SETI@home went quiet. Yet this was far from the end. 17 billion signals now need to be analyzed intelligence.

Do You Remember Halley’s Comet? It Visited Us 35 Years Ago This Week But When Is It Coming Back?

Factors associated with racial differences in deaths among nursing home residents with COVID-19 in US