Scientists are trying to understand how complex life emerged on Earth about 2 billion years ago. Our microbial ancestors could be the key.

The warning comes as Iran retaliates against a joint U.S.-Israeli attack that killed Supreme Leader Ayatollah Ali Khamenei and dozens of top Iranian officials on Saturday.

Northern Arizona University has engaged The PICTOR Group, a nationally respected athletics leadership and strategy firm, to provide interim leadership support for Lumberjack Athletics. As part of this ...