An ancient dog fossil helps trace humans’ path into the Americas
An ancient bone from a dog, discovered in a cave in southeast Alaska, hints at when and how humans entered the Americas at the...
What you need to know about J&J’s newly authorized one-shot COVID-19 vaccine
And then there were three: A single-shot vaccine is the latest weapon to join the battle against COVID-19 in the United States.
On February 27,...
Readers react to the history of plate tectonics, pandas rolling in poop and more
Shaking up memories
A post–World War II data boom clinched the unifying theory of plate tectonics after decades of debate over whether Earth’s crust was...