Rats practice running through mazes, cats envision future hunts in their heads—scientists are learning more than ever before about animal dreamers.
Vaxess, a Cambridge startup with ties to Harvard, MIT, and Tufts, raised $27 million to test its technology in clinical trials after developing the idea for more than a decade.
A health worker uses a pulse oximeter to check the oxygen saturation level of another after administering COVID-19 vaccine at a hospital in Gauhati, India, Jan. 21, 2021.
Tracing connections between neuron populations could help researchers map brain circuits that underlie behavior and perception.
If wildfires become larger and more frequent, they might stall ozone recovery for years.