Officials: Likely no survivors from plane, Army helicopter crash in D.C. A passenger jet and a Black Hawk helicopter collided ...

"We are devastated by this unspeakable tragedy and hold the victims’ families closely in our hearts," the statement noted ...

The Texas A&M Forest Service has highlighted the black willow, or Salix nigra, as January's riparian tree spotlight. Native ...

For millions of years, tree species have spread from the Amazon to Atlantic rainforests across a region that’s too arid for them to grow. How exactly they make this challenging journey has been ...