Evidence is growing that when masks are worn by nearly everyone, it can slow coronavirus transmission.
AP Photo/Rick Bowmer
Jeremy Howard, University of San Francisco
Recommendations around mask usage are confusing. The science isn't. Evidence shows that masks are extremely effective to slow the coronavirus and may be the best tool available right now to fight it.
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Footprints, preserved in solidified ash, hint at human behavior from as long as 19,000 years ago.
Cynthia Liutkus-Pierce
William E.H. Harcourt-Smith, Lehman College, CUNY; Briana Pobiner, Smithsonian Institution
The footprints of over 20 different prehistoric people, pressed into volcanic ash thousands of years ago in Tanzania, show possible evidence for sexual division of labor in this ancient community.
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Collecting data on invasive plants, Santa Monica Mountains National Recreation Area, California.
Connar L'Ecuyer/NPS
Richard B. Primack, Boston University; Casey Setash, Colorado State University
The COVID-19 pandemic is interrupting scientific field work across North America, leaving blank spots in important data sets and making it harder to track ecological change.
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