A critical tree species found in some of America's most revered national parks is in decline, leading researchers to embark on a race to prevent more from dying off.

Residents of Rochester, New York, have been preparing for the once-in-a-lifetime total solar eclipse for years.

The Burkle family of Ohio told ABC News how Ohio House Bill 68 would have impacted their family.

Only six times in history has a member of the U.S. House of Representatives been expelled.

The technology will allow conservationists to study at-risk species in detail.

New York City's Climate Museum is welcoming visitors free of charge to its pop-up exhibit in Soho.

The critically endangered species' habitat continues to be encroached upon.