Residents in lower-income areas, often near highways and industrial sites, still breathe some of the dirtiest air in the ...

The beautiful Serviceberry tree is a diminutive yet hardy specimen from the eastern US, loved for its flowers and foliage. It's these qualities that earn it its reputation as a tough urban tree.

All astronauts will be dropped off at the International Space Station, and then NASA will announce that it has to go out to ...