"To cure disease and prevent death is to promote the fundamental conditions of social welfare."
Scientists may soon be able to monitor whole ecosystems in real time.
Hearing people talk can terrify even top predators such as mountain lions, with consequences that ripple through entire ecosystems.
They seem to be capable of coordinating their dives from more than 60 miles apart.
The virus is not going away, and Donald Trump or Kamala Harris will have no choice but to deal with it.