Much of the millions of metric tons of plastic waste that washes into the sea each year is broken down into tiny fragments by the forces of the ocean, and researchers are beginning to piece together what this means for organisms that consume them. Scientists…

Antibiotics were one of the most important inventions of the 20th century, but their effectiveness is plummeting as bacteria develop resistance to them. Now, researchers at Washington University in St. Louis have shown that ultrashort pulses of laser light…

Adults who have been fully vaccinated against SARS-CoV-2 can carry the same viral load of the delta variant as those who are unvaccinated, a preliminary analysis of UK data suggests.1

The latest results from the UK’s national covid-19 infection survey show…