The roots of Russia's invasion of Ukraine go back decades and run deep. The current conflict is more than one country fighting to take over another; it is — in the words of one U.S. official — a shift ...

In many submerged regions, murky mud shelters strange life-forms that seem to be the key to one of the biggest mysteries of life on Earth. These creatures belong to a domain of life called the archaea ...

It’s that time of the year when PBS News Hour invites two of our regular literary critics, Ann Patchett and Maureen Corrigan, to highlight their favorite books of the year. Jeffrey Brown picks up the ...