One of the biggest challenges to battling the rapid spread of COVID-19 is identifying and isolating people who are infected before the symptoms, which usually take between 3 to ...

Killer whales, or orcas, are the largest members of the oceanic dolphin family. While the intelligent mammals, which hunt in large pods, are known for their orchestrated attacks...

The San Francisco Zoo's annual "March of the Penguins," to celebrate the graduation of their Magellanic penguin chicks from "fish school," is usually attended by hundreds of che...