Plus more science news for the week, including the chemical linked to Beirut’s explosions.
The National Institutes of Health completed a phase one trial on a vaccine created by the company Moderna.
How scientists are using sewage to trace the pandemic. Plus, the toll fireworks can take on the lungs, and a birdsong gone viral.
Plus, why we shouldn’t count on lockdowns to work again.
Fifty years of research suggests police behavior makes the biggest difference in how safe protests are for everyone. Plus, how tear gas ups COVID-19 risk.