Sodium–air fuel cells could unlock electric flight and clean transit, capturing CO₂ and outperforming lithium batteries.

Plus: Tariffs, YouTube sitcoms and literal killer apps.

With the fire season upon us again, I'm wondering if we have some kind of citywide alarm system telling us to evacuate if ...

I would like to commend my husband, Mark Reavis -- former City of Flagstaff Heritage Preservation officer and senior planner ...